Edgar Filing: BLACKROCK CORE BOND TRUST

/s/ John M. Perlowski

John M. Perlowski

Chief Executive Officer (principal executive officer) of

BlackRock Core Bond Trust

BlackRock Core Bond Trust

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number: 811-10543

Name of Fund: BlackRock Core Bond Trust (BHK)

Fund Address: 100 Bellevue Parkway, Wilmington, DE 19809

Name and address of agent for service: John M. Perlowski, Chief Executive Officer, BlackRock Core Bond Trust, 55 East 52^nd Street, New York, NY 10055

Registrant’s telephone number, including area code: (800) 882-0052, Option 4

Date of fiscal year end: 08/31/2018

Date of reporting period: 05/31/2018

Item 1 – Schedule of Investments

Schedule of Investments (unaudited)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Asset-Backed Securities — 11.5%

Asset-Backed Securities — 11.5%
AIMCO CLO, Series 2014-AA, Class DR, (3 mo. LIBOR US + 3.55%), 5.61%, 07/20/26^(a)(b)		USD	795	$	795,400
ALM Loan Funding, 5.50%, 07/15/26^(b)(c)(d)			1,000		1,000,000
ALM VI Ltd., Series 2012-6A^(b):
Class B2RR, (3 mo. LIBOR US + 2.05%), 3.77%, 07/15/26^(a)			1,000		1,000,212
Class BR3, 4.53%, 07/15/26^(c)(d)			1,000		1,000,000
ALM XII Ltd., Series 2015-12A, Class C1R2, 4.74%, 04/16/27^(b)(c)(d)(e)			545		544,728
ALM XVI Ltd./ALM XVI LLC, Series 2015-16A, Class C2R, (3 mo. LIBOR US + 3.20%), 5.55%, 07/15/27^(a)(b)			2,080		2,081,572
Anchorage Capital CLO 2013-1 Ltd., Series 2013-1A, Class CR, 5.54%, 10/13/30^(b)(c)			1,000		999,075
Anchorage Capital CLO Ltd.^(a)(b):
Series 2016-8A, Class D, (3 mo. LIBOR US + 4.20%), 6.56%, 07/28/28			1,000		1,004,133
Series 2016-9A, Class D, (3 mo. LIBOR US + 4.00%), 6.35%, 01/15/29			650		654,822
Ares XXVIII CLO Ltd., Series 2013-3A, Class DR, (3 mo. LIBOR US + 3.25%), 5.60%, 10/17/24^(a)(b)			1,000		1,001,186
Atlas Senior Loan Fund Ltd.(3 mo. LIBOR US + 3.90%), 6.22%, 11/30/28^(a)(b)			1,250		1,258,957
Battalion CLO VII Ltd., Series 2014-7A, Class C, (3 mo. LIBOR US + 3.90%), 6.25%, 10/17/26^(a)(b)			1,000		999,159
Battalion CLO X Ltd., Series 2016-10A, Class C, (3 mo. LIBOR US + 4.25%), 6.61%, 01/24/29^(a)(b)			1,000		1,010,336
BlueMountain CLO Ltd., Series 2014-3A, Class CR, (3 mo. LIBOR US + 3.20%), 5.55%, 10/15/26^(a)(b)			1,000		1,001,933
Bowman Park CLO Ltd., Series 2014-1A, Class D2R, (3 mo. LIBOR US + 3.35%), 5.68%, 11/23/25^(a)(b)			3,000		3,003,444
CenterPoint Energy Transition Bond Co. IV LLC, Series 2012-1, Class A3, 3.03%, 10/15/25			2,210		2,195,825
CIFC Funding Ltd., Series 2014-4A, Class D, (3 mo. LIBOR US + 3.40%), 5.75%, 10/17/26^(a)(b)			2,000		2,002,835
Countrywide Asset-Backed Certificates, Series 2006-13, Class 3AV2, (1 mo. LIBOR US + 0.15%), 2.11%, 01/25/37^(a)			180		179,524


Security	Par (000)			Value
Asset-Backed Securities (continued)
DCP Rights LLC, Series 2014-1A, Class A, 5.46%, 10/25/44^(b)		USD	3,804	$	3,811,118
Dryden 41 Senior Loan Fund, Series 2015-41A, Class AR, 3.32%, 04/15/31^(b)(c)			2,550		2,544,716
Dryden 64 CLO Ltd., Series 2018-64A, Class D, 4.87%, 04/18/31^(b)(c)(e)			1,250		1,243,750
Dryden Senior Loan Fund, Series 2014-34A, Class CR, (3 mo. LIBOR US + 2.15%), 4.50%, 10/15/26^(a)(b)			1,000		1,000,214
Dryden XXVIII Senior Loan Fund, Series 2013-28A, Class B1LR, (3 mo. LIBOR US + 3.15%), 5.49%, 08/15/30^(a)(b)			1,000		999,562
Galaxy XXIX CLO, Ltd., Series 2018-29A, Class D, 2.40%, 11/15/26^(b)(c)			805		805,000
GoldenTree Loan Opportunities IX Ltd., Series 2014-9A, Class D, 5.86%, 10/29/26^(b)(c)			1,000		1,001,633
Highbridge Loan Management 3-2014, Series 3A-2014, Class CR, (3 mo. LIBOR US + 3.60%), 5.96%, 07/18/29^(a)(b)			1,000		1,007,058
Highbridge Loan Management Ltd., Series 5A-2015^(a)(b⁾:
Class C1R, (3 mo. LIBOR US + 2.10%), 4.46%, 01/29/26			4,000		4,002,339
Class D1R, (3 mo. LIBOR US + 3.30%), 5.66%, 01/29/26			500		500,439
Lendmark Funding Trust, Series 2017-2A, Class A, 2.80%, 05/20/26^(b)			2,880		2,860,041
Limerock CLO III LLC, Series 2014-3A, Class C, (3 mo. LIBOR US + 3.60%), 5.96%, 10/20/26^(a)(b)			3,750		3,757,342
Madison Park Funding XV Ltd., Series 2014-15A, Class B1R, (3 mo. LIBOR US + 2.20%), 4.57%, 01/27/26^(a)(b)			1,800		1,802,698
Nelnet Student Loan Trust, Series 2006-1, Class A5, (3 mo. LIBOR US + 0.11%), 2.03%, 08/23/27^(a)			499		497,780
Neuberger Berman CLO XV Ltd., Series 2013-15A, Class DR, 5.40%, 10/15/29^(b)(c)			1,000		1,001,267
Neuberger Berman CLO XVIII Ltd., Series 2014-18A, Class CR, (3 mo. LIBOR US + 4.25%), 6.61%, 11/14/27^(a)(b)			2,250		2,269,436
OCP CLO Ltd., Series 2012-2A, Class DR, (3 mo. LIBOR US + 4.47%), 6.80%, 11/22/25^(a)(b)			1,000		1,010,128
Octagon Investment Partners XXI Ltd., Series 2014-1A, Class C, (3 mo. LIBOR US + 3.65%), 6.01%, 11/14/26^(a)(b)			2,000		2,008,120


			1

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Asset-Backed Securities (continued)
Octagon Investment Partners XXII Ltd., Series 2014-1A, Class DRR, 5.11%, 01/22/30^(b)(c)		USD	500	$	496,925
OHA Credit Partners XIII Ltd., Series 2016-13A, Class E, (3 mo. LIBOR US + 7.15%), 9.51%, 01/21/30^(a)(b)			595		610,109
OHA Loan Funding 2016-1 Ltd., Series 2016-1A, Class D, (3 mo. LIBOR US + 3.75%), 6.11%, 01/20/28^(a)(b)			2,500		2,517,325
OneMain Financial Issuance Trust, Series 2015-2A, Class C, 4.32%, 07/18/25^(b)			5,000		4,990,013
OZLM Funding III Ltd., Series 2013-3A, Class BR, (3 mo. LIBOR US + 3.00%), 5.36%, 01/22/29^(a)(b)			1,500		1,518,201
OZLM VII Ltd., Series 2014-7A, Class CR, (3 mo. LIBOR US + 3.50%), 5.85%, 07/17/26^(a)(b)			950		951,690
OZLM VIII Ltd., Series 2014-8A, Class CR, (3 mo. LIBOR US + 1.44%), 5.75%, 10/17/26^(a)(b)			1,750		1,752,497
OZLM XIV Ltd., Series 2015-14A, Class CR, 5.00%, 01/15/29^(b)(c)(d)			1,000		1,000,000
OZLM XXI, Series 2017-21A, Class C, 4.42%, 01/20/31^(b)(c)			1,000		998,387
Regatta V Funding Ltd., Series 2014-1A, Class C, (3 mo. LIBOR US + 3.45%), 5.81%, 10/25/26^(a)(b)			2,000		2,002,877
Rockford Tower CLO Ltd., Series 2017-1A, Class D, (3 mo. LIBOR US + 3.25%), 5.60%, 04/15/29^(a)(b)			1,750		1,752,628
Shackleton CLO Ltd., Series 2013-3A, Class DR, 4.74%, 07/15/30^(b)(c)			500		496,294
SLM Private Education Loan Trust^(b):
Series 2012-A, Class A2, 3.83%, 01/17/45			315		316,467
Series 2014-A, Class B, 3.50%, 11/15/44			500		498,201
Sound Point CLO VII Ltd., Series 2014-3A, Class D, (3 mo. LIBOR US + 3.60%), 5.96%, 01/23/27^(a)(b)			1,250		1,252,579
Sound Point CLO XIV Ltd., Series 2016-3A, Class D, (3 mo. LIBOR US + 3.85%), 6.21%, 01/23/29^(a)(b)			1,550		1,565,417
Structured Asset Securities Corp., Series 2002-AL1, Class A2, 3.45%, 02/25/32			529		522,716
THL Credit Wind River CLO Ltd., Series 2014-3A, Class DR, (3 mo. LIBOR US + 3.35%), 5.71%, 01/22/27^(a)(b)			1,000		1,001,065


Security	Par (000)			Value
Asset-Backed Securities (continued)
Voya CLO 2017-3 Ltd., Series 2017-3A, Class C, (3 mo. LIBOR US + 3.55%), 5.29%, 07/20/30^(a)(b)		USD	1,000	$	1,009,762
Voya CLO Ltd., Series 2016-3A, Class D, (3 mo. LIBOR US + 6.85%), 8.58%, 10/18/27^(a)(b)			615		623,767
Wellfleet CLO 2015-1 Ltd., Series 2015-1A, Class DR, 5.16%, 10/20/27^(b)(c)			2,000		2,004,375
World Financial Network Credit Card Master Trust, Series 2012-C, Class C, 4.55%, 08/15/22			2,360		2,372,390
York CLO Ltd., Series 2016-1A, Class DR, (3 mo. LIBOR US + 3.60%), 5.96%, 10/20/29^(a)(b)			1,750		1,764,421
York CLO-4 Ltd., Series 2016-2A, Class D, (3 mo. LIBOR US + 4.10%), 6.46%, 01/20/30^(a)(b)			1,500		1,531,526

					87,405,414
Interest Only Asset-Backed Securities — 0.0%
Sterling Bank Trust, Series 2004-2, Class Note, 2.08%, 03/30/30^(b)(e)			2,406		130,055
Sterling Coofs Trust, Series 2004-1, Class A, 2.36%, 04/15/29^(e)			3,146		160,782

					290,837

Total Asset-Backed Securities — 11.5% (Cost — $87,197,866)					87,696,251


Corporate Bonds — 67.5%

Aerospace & Defense — 1.2%
Arconic, Inc.:
5.40%, 04/15/21			235		241,145
5.13%, 10/01/24			598		600,242
5.90%, 02/01/27			100		101,160
6.75%, 01/15/28			38		40,343
BBA US Holdings, Inc., 5.38%, 05/01/26^(b)			194		194,485
Bombardier, Inc.^(b):
7.75%, 03/15/20			122		129,625
8.75%, 12/01/21			468		519,480
6.00%, 10/15/22			13		12,900
6.13%, 01/15/23			486		484,178
7.50%, 12/01/24			450		469,125
7.50%, 03/15/25			573		591,680
7.45%, 05/01/34			100		101,250
Eaton Corp., 4.15%, 11/02/42			500		489,272
EnPro Industries, Inc., 5.88%, 09/15/22			74		75,665


2

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Aerospace & Defense (continued)
KLX, Inc., 5.88%, 12/01/22^(b)		USD	595	$	621,775
Koppers, Inc., 6.00%, 02/15/25^(b)			151		153,076
Kratos Defense & Security Solutions, Inc., 6.50%, 11/30/25^(b)			142		147,325
Lockheed Martin Corp., 4.09%, 09/15/52			1,410		1,348,768
Pioneer Holdings LLC/Pioneer Finance Corp., 9.00%, 11/01/22^(b)			118		122,130
SoftBank Group Corp., 4.00%, 04/20/23		EUR	100		120,178
TransDigm UK Holdings PLC, 6.88%, 05/15/26^(b)		USD	200		204,000
TransDigm, Inc.:
6.00%, 07/15/22			441		447,064
6.50%, 07/15/24			191		194,820
6.50%, 05/15/25			104		105,498
United Technologies Corp., 6.13%, 07/15/38			1,450		1,728,433

					9,243,617
Air Freight & Logistics — 0.2%
FedEx Corp., 4.75%, 11/15/45			1,250		1,275,817
XPO Logistics, Inc., 6.50%, 06/15/22^(b)			325		332,800

					1,608,617
Airlines — 2.1%
Air Canada Pass-Through Trust, Series 2015-1, Class B, 3.88%, 09/15/24^(b)			1,633		1,598,687
American Airlines Pass-Through Trust:
Series 2013-2, Class A, 4.95%, 07/15/24^(f)			3,288		3,402,817
Series 2015-2, Class A, 4.00%, 03/22/29			1,358		1,351,701
Series 2015-2, Class AA, 3.60%, 03/22/29			1,358		1,323,204
Series 2017-1, Class B, 4.95%, 08/15/26			1,797		1,824,970
Avianca Holdings SA/Avianca Leasing LLC/Grupo Taca Holdings Ltd., 8.38%, 05/10/20			302		306,530
Continental Airlines Pass-Through Trust, Series 2010-1, Class B, 6.00%, 07/12/20			227		230,453
Latam Finance Ltd., 6.88%, 04/11/24^(b)			257		251,217
Mexico City Airport Trust, 5.50%, 07/31/47^(b)			260		226,850
United Airlines Pass-Through Trust:
Series 2013-1, Class A, 4.30%, 02/15/27			3,309		3,369,857


Security	Par (000)			Value
Airlines (continued)
United Airlines Pass-Through Trust (continued):
Series 2014-2, Class B, 4.63%, 03/03/24		USD	2,103	$	2,118,697

					16,004,983
Auto Components — 0.3%
Adient Global Holdings Ltd., 3.50%, 08/15/24		EUR	100		114,039
Allison Transmission, Inc., 5.00%, 10/01/24^(b)		USD	19		18,858
Aptiv PLC, 4.40%, 10/01/46			465		438,696
Gestamp Funding Luxembourg SA, 3.50%, 05/15/23		EUR	100		119,879
HP Pelzer Holding GmbH, 4.13%, 04/01/24			100		118,214
Icahn Enterprises LP/Icahn Enterprises Finance Corp.:
6.00%, 08/01/20		USD	20		20,375
6.25%, 02/01/22			242		247,747
6.75%, 02/01/24			112		114,520
6.38%, 12/15/25			106		105,603
IHO Verwaltungs GmbH^(g):
(2.75% Cash or 3.50% PIK), 2.75%, 09/15/21		EUR	100		118,776
(3.25% Cash or 4.00% PIK), 3.25%, 09/15/23			100		119,957
(4.50% Cash or 5.25% PIK), 4.50%, 09/15/23^(b)		USD	205		197,569
Tesla, Inc., 5.30%, 08/15/25^(b)(f)			285		247,237
Volvo Car AB, 2.00%, 01/24/25		EUR	100		116,174

					2,097,644
Automobiles — 0.6%
Ford Motor Co., 4.75%, 01/15/43^(f)		USD	2,000		1,793,321
General Motors Co., 6.25%, 10/02/43			2,506		2,691,829

					4,485,150
Banks — 1.9%
Allied Irish Banks PLC (5 year EUR Swap + 3.95%), 4.13%, 11/26/25^(h)		EUR	100		122,968
Banco Inbursa SA Institucion de Banca Multiple, 4.13%, 06/06/24^(b)		USD	255		243,018
Banco Popolare, 2.75%, 07/27/20		EUR	100		117,361
Bank of Ireland Group PLC, 3.13%, 09/19/27^(c)		GBP	100		130,755
Bankia SA (5 year EUR Swap + 3.17%), 4.00%, 05/22/24^(h)		EUR	100		119,932
Barclays PLC:
4.38%, 09/11/24		USD	550		533,687
3.65%, 03/16/25^(f)			4,320		4,060,416
CaixaBank SA (5 year EUR Swap + 3.35%), 3.50%, 02/15/27^(h)		EUR	100		121,538


			3

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Banks (continued)
CIT Group, Inc.:
5.00%, 08/01/23		USD	225	$	227,250
5.25%, 03/07/25			126		127,890
6.13%, 03/09/28			70		71,575
Cooperatieve Rabobank UA, 3.95%, 11/09/22			1,500		1,496,729
HSBC Holdings PLC, 6.10%, 01/14/42			610		758,702
Inversiones Atlantida SA, 8.25%, 07/28/22^(b)			200		209,500
National Bank of Greece SA, 2.75%, 10/19/50		EUR	100		118,655
Santander Holdings USA, Inc., 4.50%, 07/17/25^(f)		USD	2,000		1,979,067
Santander UK Group Holdings PLC, 2.88%, 08/05/21			1,250		1,221,041
Standard Chartered PLC, 4.87%, 03/15/33^(b)(c)			500		486,398
Wells Fargo & Co., 3.90%, 05/01/45^(f)			2,250		2,098,662

					14,245,144
Beverages — 0.7%
Anheuser-Busch InBev Finance, Inc., 4.90%, 02/01/46			4,600		4,791,603
Central American Bottling Corp., 5.75%, 01/31/27^(b)			222		222,555
OI European Group BV, 4.00%, 03/15/23^(b)			191		179,540

					5,193,698
Biotechnology — 0.5%
Amgen, Inc., 4.40%, 05/01/45^(f)			2,250		2,197,877
Baxalta, Inc., 5.25%, 06/23/45			500		528,120
Gilead Sciences, Inc., 4.80%, 04/01/44			1,000		1,047,338
Illumina, Inc., 0.50%, 06/15/21⁽ⁱ⁾			215		281,616
Senvion Holding GmbH, 3.88%, 10/25/22		EUR	100		100,979

					4,155,930
Building Materials — 0.0%
American Woodmark Corp., Co. GUAR 144A 03/26 4.875, 4.88%, 03/15/26^(b)		USD	69		65,895
Jeld-Wen, Inc., 4.63%, 12/15/25^(b)			66		62,370
Titan Global Finance PLC, 3.50%, 06/17/21		EUR	100		121,289

					249,554
Building Products — 0.2%
Beacon Escrow Corp., 4.88%, 11/01/25^(b)		USD	228		209,760
Building Materials Corp. of America, 6.00%, 10/15/25^(b)			115		116,150


Security	Par (000)			Value
Building Products (continued)
CPG Merger Sub LLC, 8.00%, 10/01/21^(b)		USD	218	$	222,633
Jeld-Wen, Inc., 4.88%, 12/15/27^(b)			46		42,780
Masonite International Corp., 5.63%, 03/15/23^(b)			249		256,221
Standard Industries, Inc.^(b):
5.50%, 02/15/23			45		45,956
5.38%, 11/15/24			19		18,668
USG Corp., 4.88%, 06/01/27^(b)			208		207,282

					1,119,450
Building: Roofing, Wallboard & Plumbing — 0.0%
Quintiles IMS, Inc., 4.88%, 05/15/23^(b)			74		74,370

Cable Television Services — 0.0%
CB Escrow Corp., 8.00%, 10/15/25^(b)			127		118,745

Capital Markets — 2.8%
Blackstone CQP Holdco LP^(b):
6.50%, 03/20/21			1,375		1,375,000
6.00%, 08/18/21			224		223,440
CDP Financial, Inc., 5.60%, 11/25/39^(b)(f)			5,890		7,523,020
Goldman Sachs Group, Inc., 3.75%, 05/22/25^(f)			8,965		8,792,949
Lions Gate Capital Holdings LLC, 5.88%, 11/01/24^(b)			57		57,000
Morgan Stanley:
4.00%, 07/23/25			905		909,838
3.13%, 07/27/26^(f)			2,000		1,877,803
NFP Corp., 6.88%, 07/15/25^(b)			62		61,225
Raymond James Financial, Inc., 4.95%, 07/15/46			400		420,375
SURA Asset Management SA, 4.38%, 04/11/27^(b)			259		248,316

					21,488,966
Chemicals — 1.1%
Air Liquide Finance SA, 3.50%, 09/27/46^(b)			360		332,936
Alpha 2 BV, (8.75% Cash or 9.50% PIK), 8.75%, 06/01/23^(b)(g)			210		207,112
Alpha 3 BV/Alpha US Bidco, Inc., 6.25%, 02/01/25^(b)			400		394,000
Axalta Coating Systems LLC, 4.88%, 08/15/24^(b)			161		158,987
Blue Cube Spinco, Inc.:
9.75%, 10/15/23			244		279,075
10.00%, 10/15/25			183		213,195
CF Industries, Inc.:
7.13%, 05/01/20			38		40,375
5.15%, 03/15/34			60		55,200
4.95%, 06/01/43			116		96,280


4

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security		Par (000)		Value
Chemicals (continued)
Chemours Co.:
6.63%, 05/15/23	USD		182	$	191,151
7.00%, 05/15/25			44		47,190
5.38%, 05/15/27			145		141,012
Cydsa SAB de C.V., 6.25%, 10/04/27^(b)			319		298,265
Eagle Intermediate Global Holding BV/Ruyi US Finance LLC, 7.50%, 05/01/25^(b)			156		159,167
Hexion, Inc., 10.38%, 02/01/22^(b)			122		119,713
INEOS Finance PLC, 4.00%, 05/01/23	EUR		100		119,257
Methanex Corp., 3.25%, 12/15/19	USD		1,650		1,644,068
Mexichem SAB de CV^(b):
4.00%, 10/04/27			200		180,800
5.50%, 01/15/48			200		171,500
Momentive Performance Materials, Inc., 3.88%, 10/24/21			735		775,425
NOVA Chemicals Corp., 4.88%, 06/01/24^(b)			163		155,869
Olin Corp., 5.00%, 02/01/30			82		77,187
Platform Specialty Products Corp.^(b):
6.50%, 02/01/22^(f)			1,265		1,296,625
5.88%, 12/01/25			538		517,825
PQ Corp.^(b):
6.75%, 11/15/22			251		264,177
5.75%, 12/15/25			224		220,080
PSPC Escrow Corp., 6.00%, 02/01/23	EUR		100		120,997
WR Grace & Co-Conn^(b):
5.13%, 10/01/21	USD		228		234,840
5.63%, 10/01/24			80		82,800

					8,595,108
Commercial Services & Supplies — 0.6%
ADT Corp.:
6.25%, 10/15/21			86		88,580
3.50%, 07/15/22			163		149,960
4.13%, 06/15/23			171		156,465
4.88%, 07/15/32^(b)			301		236,285
Advanced Disposal Services, Inc., 5.63%, 11/15/24^(b)			115		115,000
Aviation Capital Group Corp., 7.13%, 10/15/20^(b)			1,800		1,944,088
Booz Allen Hamilton, Inc., 5.13%, 05/01/25^(b)			82		80,360
CD&R Waterworks Merger Sub LLC, 6.13%, 08/15/25^(b)			226		216,960
Fortress Transportation & Infrastructure Investors LLC, 6.75%, 03/15/22^(b)			43		43,430
Harland Clarke Holdings Corp., 8.38%, 08/15/22^(b)			284		284,710
Iron Mountain, Inc., 6.00%, 08/15/23			80		82,400
KAR Auction Services, Inc., 5.13%, 06/01/25^(b)			135		128,250


Security	Par (000)			Value
Commercial Services & Supplies (continued)
La Financiere Atalian SAS, 5.13%, 05/15/25		EUR	100	$	113,954
Mobile Mini, Inc., 5.88%, 07/01/24		USD	278		282,170
Park Aerospace Holdings Ltd.^(b):
3.63%, 03/15/21			166		159,775
5.25%, 08/15/22			157		154,841
Ritchie Bros Auctioneers, Inc., 5.38%, 01/15/25^(b)			181		176,249
United Rentals North America, Inc.:
5.75%, 11/15/24			46		47,380
5.50%, 07/15/25			93		94,163
5.50%, 05/15/27			111		109,890
Wrangler Buyer Corp., 6.00%, 10/01/25^(b)			204		194,310

					4,859,220
Communications Equipment — 0.2%
CommScope Technologies LLC, 5.00%, 03/15/27^(b)			114		106,590
CommScope, Inc.^(b):
5.00%, 06/15/21			80		80,400
5.50%, 06/15/24			154		154,385
Nokia OYJ:
3.38%, 06/12/22			72		70,200
4.38%, 06/12/27			31		29,188
6.63%, 05/15/39			135		141,394
Zayo Group LLC/Zayo Capital, Inc.:
6.00%, 04/01/23			606		614,332
6.38%, 05/15/25			30		30,413
5.75%, 01/15/27^(b)			451		436,342

					1,663,244
Construction & Engineering — 0.8%
Aeropuertos Argentina 2000 SA, 6.88%, 02/01/27^(b)			370		362,237
Aeropuertos Dominicanos Siglo XXI SA, 6.75%, 03/30/29^(b)			370		384,337
BlueLine Rental Finance Corp., 9.25%, 03/15/24^(b)			788		840,772
Brand Energy & Infrastructure Services, Inc., 8.50%, 07/15/25^(b)			159		162,578
Engility Corp., 8.88%, 09/01/24			176		184,360
ITR Concession Co. LLC, 4.20%, 07/15/25^(b)			4,000		3,675,751
SPIE SA, 3.13%, 03/22/24		EUR	100		117,173
SRS Distribution, Inc., 8.25%, 07/01/26^(b)		USD	132		128,535
Tutor Perini Corp., 6.88%, 05/01/25^(b)			109		109,785


			5

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Construction & Engineering (continued)
Weekley Homes LLC/Weekley Finance Corp., 6.63%, 08/15/25^(b)		USD	51	$	48,578

					6,014,106
Construction Materials — 0.3%
American Builders & Contractors Supply Co., Inc., 5.88%, 05/15/26^(b)			43		42,248
American Tire Distributors, Inc., 10.25%, 03/01/22^(b)			140		68,600
HD Supply, Inc., 5.75%, 04/15/24^(b)(f)			1,410		1,478,737
Navistar International Corp., 6.63%, 11/01/25^(b)			192		198,240
New Enterprise Stone & Lime Co., Inc., 10.13%, 04/01/22^(b)			108		114,750
PulteGroup, Inc.:
5.50%, 03/01/26			17		16,915
6.00%, 02/15/35			27		26,325
Rexel SA, 3.50%, 06/15/23		EUR	100		120,751
Williams Scotsman International, Inc., 7.88%, 12/15/22^(b)		USD	78		81,510

					2,148,076
Consumer Discretionary — 0.1%
Arch Merger Sub, Inc., 8.50%, 09/15/25^(b)			150		139,125
Elis SA, 1.88%, 02/15/23		EUR	100		115,997
Nielsen Co. Luxembourg SARL, 5.00%, 02/01/25^(b)		USD	30		28,950
Silversea Cruise Finance Ltd., 7.25%, 02/01/25^(b)			39		40,658
Viking Cruises Ltd.^(b):
6.25%, 05/15/25			95		93,337
5.88%, 09/15/27			312		291,720

					709,787
Consumer Finance — 1.6%
Ally Financial, Inc., 8.00%, 11/01/31			871		1,045,200
Capital One Financial Corp., 4.75%, 07/15/21^(f)			1,935		2,009,866
Corvias Campus Living USG LLC, 5.30%, 07/01/50^(e)			5,700		5,679,925
Credivalores-Crediservicios SAS, 9.75%, 07/27/22^(b)			200		199,500
Ford Motor Credit Co. LLC, 8.13%, 01/15/20^(f)			1,530		1,647,400
Navient Corp.:
5.00%, 10/26/20			180		181,080
6.63%, 07/26/21			99		102,713
6.50%, 06/15/22			159		164,168
5.50%, 01/25/23			170		167,237
7.25%, 09/25/23			93		97,883
6.13%, 03/25/24			21		21,053


Security	Par (000)			Value
Consumer Finance (continued)
Navient Corp. (continued):
5.88%, 10/25/24		USD	56	$	55,177
6.75%, 06/25/25			112		113,926
5.63%, 08/01/33			101		86,355
OneMain Financial Holdings LLC, 7.25%, 12/15/21^(b)			76		78,774
Springleaf Finance Corp.:
6.13%, 05/15/22			50		51,000
5.63%, 03/15/23			6		5,925
6.88%, 03/15/25			112		111,440
7.13%, 03/15/26			219		218,934

					12,037,556
Containers & Packaging — 0.7%
Ardagh Packaging Finance PLC/Ardagh Holdings USA, Inc.:
4.63%, 05/15/23^(b)			471		467,915
6.75%, 05/15/24		EUR	100		126,404
7.25%, 05/15/24^(b)(f)		USD	1,255		1,309,906
4.75%, 07/15/27		GBP	100		128,379
Ball Corp.:
5.00%, 03/15/22		USD	141		145,230
4.00%, 11/15/23			146		143,080
Berry Global, Inc., 4.50%, 02/15/26^(b)			86		80,410
BWAY Holding Co.^(b):
5.50%, 04/15/24			329		324,888
7.25%, 04/15/25			196		192,452
Crown Americas LLC/Crown Americas Capital Corp.:
4.75%, 02/01/26^(b)			88		83,125
4.25%, 09/30/26			139		125,795
JH-Holding Finance SA, (8.25% PIK), 8.25%, 12/01/22^(g)		EUR	100		121,986
Mercer International, Inc.:
7.75%, 12/01/22		USD	29		30,450
6.50%, 02/01/24			76		78,090
5.50%, 01/15/26^(b)			38		37,240
Reynolds Group Issuer, Inc./Reynolds Group Issuer LLC/Reynolds Group Issuer Lu:
5.75%, 10/15/20			120		120,920
6.88%, 02/15/21			118		119,001
(3 mo. LIBOR US + 3.50%), 5.85%, 07/15/21^(a)(b)			152		153,778
5.13%, 07/15/23^(b)			161		158,183
7.00%, 07/15/24^(b)			400		410,480
Sappi Papier Holding GmbH, 4.00%, 04/01/23		EUR	100		120,798
Sealed Air Corp., 4.88%, 12/01/22^(b)		USD	343		349,860
Silgan Holdings, Inc., 3.25%, 03/15/25		EUR	100		118,944


6

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Containers & Packaging (continued)
Verallia Packaging SASU, 5.13%, 08/01/22		EUR	100	$	120,377

					5,067,691
Diversified Consumer Services — 0.3%
APX Group, Inc.:
8.75%, 12/01/20		USD	179		171,840
7.88%, 12/01/22			106		104,675
Ascend Learning LLC, 6.88%, 08/01/25^(b)			194		194,000
Carriage Services, Inc., 6.63%, 06/01/26^(b)			108		108,945
Graham Holdings Co., 5.75%, 06/01/26^(b)			124		124,620
Laureate Education, Inc., 8.25%, 05/01/25^(b)			210		222,075
Matthews International Corp., 5.25%, 12/01/25^(b)			44		42,570
Prime Security Services Borrower LLC/Prime Finance, Inc., 9.25%, 05/15/23^(b)			783		828,414
ServiceMaster Co. LLC, 5.13%, 11/15/24^(b)			168		162,750

					1,959,889
Diversified Financial Services — 3.8%
Aircastle Ltd.:
6.25%, 12/01/19			273		282,555
5.50%, 02/15/22			48		49,920
Banca IFIS SpA, 4.50%, 10/17/27^(c)		EUR	100		108,722
Bank of America Corp.:
5.63%, 07/01/20		USD	2,200		2,314,769
3.25%, 10/21/27^(f)			4,000		3,748,913
Docuformas SAPI de C.V., 9.25%, 10/11/22^(b)			200		187,500
FBM Finance, Inc., 8.25%, 08/15/21^(b)			185		193,658
FMR LLC, 4.95%, 02/01/33^(b)(f)			2,300		2,520,681
General Electric Co., 6.15%, 08/07/37^(f)			2,150		2,523,401
General Motors Financial Co., Inc., 4.25%, 05/15/23			807		817,995
Gilex Holding Sarl, 8.50%, 05/02/23^(b)			182		185,649
HSBC Holdings PLC, 6.25% ,12/31/2049^(c)(j)			575		575,575
Intercontinental Exchange Group, Inc., 4.00%, 10/15/23			470		481,516
Intesa Sanpaolo SpA, 5.02%, 06/26/24^(b)(f)			3,151		2,873,118
Intrum Justitia AB, 2.75%, 07/15/22		EUR	100		114,583
Jefferies Finance LLC/JFIN Co-Issuer Corp., 7.38%, 04/01/20^(b)		USD	595		598,719
LHC3 PLC, (4.13% Cash or 4.88% PIK), 4.13%, 08/15/24^(g)		EUR	100		118,058


Security	Par (000)			Value
Diversified Financial Services (continued)
Mercury Bondco PLC, (8.25% Cash or 9.00% PIK), 8.25%, 05/30/21^(g)		USD	100	$	121,866
Moody’s Corp., 4.50%, 09/01/22^(f)			1,800		1,872,296
MSCI, Inc., 5.25%, 11/15/24^(b)			75		75,750
Northern Trust Corp., 3.95%, 10/30/25			8,000		8,193,584
SPARC EM SPC Panama Metro Line 2 SP, 0.00%, 12/05/22^(b)(k)			280		251,440
Tempo Acquisition LLC/Tempo Acquisition Finance Corp., 6.75%, 06/01/25^(b)			324		313,972
Travelport Corporate Finance PLC, 6.00%, 03/15/26^(b)			123		123,615
UniCredit SpA (5 year EUR Swap + 4.10%), 5.75%, 10/28/25^(h)		EUR	107		133,277
Vantiv LLC/Vanity Issuer Corp.^(b):
3.88%, 11/15/25		GBP	100		128,415
4.38%, 11/15/25		USD	200		189,000
WMG Acquisition Corp., 5.50%, 04/15/26^(b)			84		83,160

					29,181,707
Diversified Telecommunication Services — 3.5%
AT&T, Inc.^(f):
6.38%, 03/01/41			520		587,249
5.15%, 03/15/42			2,400		2,371,253
4.75%, 05/15/46			2,710		2,506,639
CenturyLink, Inc.:
5.63%, 04/01/25			144		134,469
Series P, 7.60%, 09/15/39			7		5,915
Series S, 6.45%, 06/15/21			383		392,115
Series T, 5.80%, 03/15/22			172		169,893
Series U, 7.65%, 03/15/42			138		116,610
Series W, 6.75%, 12/01/23^(f)			163		162,593
Series Y, 7.50%, 04/01/24			212		217,968
Cincinnati Bell, Inc., 7.00%, 07/15/24^(b)			201		179,895
Embarq Corp., 8.00%, 06/01/36			46		43,700
Frontier Communications Corp.:
7.13%, 03/15/19			220		222,750
10.50%, 09/15/22			60		54,000
7.13%, 01/15/23			147		107,861
6.88%, 01/15/25			253		161,920
11.00%, 09/15/25			525		420,000
Level 3 Financing, Inc.:
5.38%, 08/15/22			127		127,000
5.63%, 02/01/23			189		190,597
5.13%, 05/01/23			95		92,867
5.38%, 01/15/24			114		111,150
5.38%, 05/01/25			123		119,003
5.25%, 03/15/26			663		630,181
OTE PLC, 3.50%, 07/09/20		EUR	100		120,827
SoftBank Group Corp.(5 year USD ICE Swap + 4.85%), 6.88%^(h)(j)		USD	215		194,037


			7

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Diversified Telecommunication Services (continued)
Telecom Italia Capital SA (continued):
Telecom Italia Capital SA:
6.38%, 11/15/33		USD	124	$	125,860
6.00%, 09/30/34			142		135,610
7.20%, 07/18/36			202		214,625
7.72%, 06/04/38			48		53,160
Telecom Italia SpA:
1.13%, 03/26/22⁽ⁱ⁾		EUR	100		110,966
3.63%, 01/19/24			200		253,365
Verizon Communications, Inc.^(f):
6.40%, 02/15/38		USD	6,879		8,071,427
6.55%, 09/15/43			6,751		8,187,406

					26,592,911
Electric Utilities — 6.2%
AES Corp., 5.50%, 04/15/25			59		59,590
Berkshire Hathaway Energy Co., 6.50%, 09/15/37^(f)			5,515		7,247,332
Black Hills Corp., 3.15%, 01/15/27			405		378,073
Celeo Redes Operacion Chile SA, 5.20%, 06/22/47^(b)			299		293,767
Cleveland Electric Illuminating Co., 5.95%, 12/15/36			434		522,662
CMS Energy Corp., 5.05%, 03/15/22^(f)			1,832		1,931,987
DPL, Inc., 7.25%, 10/15/21			21		22,890
Duke Energy Carolinas LLC:
6.10%, 06/01/37			640		809,268
6.00%, 01/15/38			1,675		2,141,894
4.25%, 12/15/41			750		780,336
Duke Energy Florida LLC, 6.40%, 06/15/38			770		1,018,534
E.ON International Finance BV, 6.65%, 04/30/38^(b)			3,100		3,910,797
Electricite de France SA, 5.60%, 01/27/40^(b)(f)			2,800		3,175,782
Enel Finance International NV, 3.63%, 05/25/27^(b)			1,250		1,145,045
Energuate Trust, 5.88%, 05/03/27^(b)			201		192,256
Florida Power Corp., 6.35%, 09/15/37^(f)			2,775		3,647,574
Jersey Central Power & Light Co., 7.35%, 02/01/19			490		503,230
NextEra Energy Operating Partners LP, 4.25%, 09/15/24^(b)			128		122,240
Ohio Power Co., Series D, 6.60%, 03/01/33^(f)			3,000		3,885,854
PacifiCorp, 6.25%, 10/15/37^(f)			1,225		1,596,869
Pampa Energia SA, 7.50%, 01/24/27^(b)			367		350,375
Public Service Co. of Colorado, Series 17, 6.25%, 09/01/37^(f)			2,550		3,308,641
Southern California Edison Co.:
5.63%, 02/01/36^(f)			1,300		1,556,586
Series A, 5.95%, 02/01/38			2,175		2,671,625
Southern Co., 4.40%, 07/01/46			1,000		1,000,532


Security	Par (000)			Value
Electric Utilities (continued)
Talen Energy Supply LLC, 6.50%, 06/01/25			125		96,838
Virginia Electric & Power Co., Series A, 6.00%, 05/15/37		USD	3,920	$	4,840,105

					47,210,682
Electrical Equipment — 0.0%
Anixter, Inc., 5.63%, 05/01/19			35		35,700
Areva SA, 4.88%, 09/23/24		EUR	50		62,947

					98,647
Electronic Equipment, Instruments & Components — 0.3%
CDW LLC/CDW Finance Corp.:
5.00%, 09/01/23		USD	134		135,340
5.50%, 12/01/24			353		363,590
5.00%, 09/01/25			72		71,122
Corning, Inc., 4.38%, 11/15/57			2,000		1,774,885
Itron, Inc., 5.00%, 01/15/26^(b)			18		17,280

					2,362,217
Energy Equipment & Services — 0.8%
Calfrac Holdings LP, 8.50%, 06/15/26^(b)			187		185,775
CSI Compressco LP/CSI Compressco Finance, Inc., 7.50%, 04/01/25^(b)			234		235,170
Ensco PLC:
5.20%, 03/15/25			25		20,938
7.75%, 02/01/26			329		313,372
Enterprise Products Operating LLC, 6.13%, 10/15/39^(f)			1,400		1,661,711
Gates Global LLC/Gates Global Co., 6.00%, 07/15/22^(b)			173		174,730
Halliburton Co., 5.00%, 11/15/45			500		540,780
McDermott Escrow 1, Inc./McDermott Escrow 2, Inc., 10.63%, 05/01/24^(b)			176		183,920
Pattern Energy Group, Inc., 5.88%, 02/01/24^(b)			148		149,850
Pioneer Energy Services Corp., 6.13%, 03/15/22			133		126,350
Precision Drilling Corp.:
6.50%, 12/15/21			48		48,970
7.75%, 12/15/23			50		52,875
5.25%, 11/15/24			90		84,600
SESI LLC, 7.75%, 09/15/24			140		145,250
Transocean, Inc.:
5.80%, 10/15/22			286		284,570
9.00%, 07/15/23^(b)			386		415,915
7.50%, 01/15/26^(b)			222		225,052
6.80%, 03/15/38			17		14,323
Trinidad Drilling Ltd., 6.63%, 02/15/25^(b)			243		231,457


8

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Energy Equipment & Services (continued)
USA Compression Partners LP/USA Compression Finance Corp., 6.88%, 04/01/26^(b)		USD	198	$	203,940
Weatherford International Ltd.:
7.75%, 06/15/21			432		438,480
8.25%, 06/15/23			115		111,550
6.50%, 08/01/36			75		58,500
7.00%, 03/15/38			124		98,580
5.95%, 04/15/42			128		94,720

					6,101,378
Environmental, Maintenance, & Security Service — 0.1%
Hulk Finance Corp., 7.00%, 06/01/26^(b)			184		178,480
Tervita Escrow Corp., 7.63%, 12/01/21^(b)			276		278,760
Waste Pro USA, Inc., 5.50%, 02/15/26^(b)			134		129,310

					586,550
Food & Staples Retailing — 0.2%
Albertsons Cos. LLC/Safeway, Inc./New Albertson’s, Inc./Albertson’s LLC:
6.63%, 06/15/24			59		55,478
5.75%, 03/15/25			68		59,854
Casino Guichard Perrachon SA, 4.56%, 01/25/23		EUR	100		122,346
Rite Aid Corp., 6.13%, 04/01/23^(b)		USD	164		168,100
Walgreens Boots Alliance, Inc., 4.80%, 11/18/44			1,000		974,558

					1,380,336
Food Products — 0.4%
Acosta, Inc., 7.75%, 10/01/22^(b)			144		86,040
Aramark Services, Inc.:
4.75%, 06/01/26			151		146,093
5.00%, 02/01/28^(b)			230		221,375
Arcor SAIC, 6.00%, 07/06/23^(b)			228		228,803
Chobani LLC/Chobani Finance Corp., Inc., 7.50%, 04/15/25^(b)			146		140,525
JBS USA LLC/JBS USA Finance, Inc.^(b):
5.88%, 07/15/24			66		63,195
5.75%, 06/15/25			386		358,980
JBS USA LUX SA/JBS USA Finance, Inc., 6.75%, 02/15/28^(b)			205		193,725
MARB BondCo PLC, 7.00%, 03/15/24			200		189,250
Marfrig Holdings Europe BV, 8.00%, 06/08/23^(b)			222		224,664
Minerva Luxembourg SA, 6.50%, 09/20/26^(b)			222		204,517
Pilgrim’s Pride Corp.^(b):
5.75%, 03/15/25			97		93,605
5.88%, 09/30/27			44		41,360


Security	Par (000)			Value
Food Products (continued)
Post Holdings, Inc.^(b):
5.50%, 03/01/25		USD	230	$	226,550
5.75%, 03/01/27			258		249,535

					2,668,217
Health Care Equipment & Supplies — 0.5%
Avantor, Inc.^(b):
6.00%, 10/01/24			1,096		1,090,520
9.00%, 10/01/25			289		298,392
Crimson Merger Sub, Inc., 6.63%, 05/15/22^(b)			903		892,318
DJO Finco, Inc./DJO Finance LLC/DJO Finance Corp., 8.13%, 06/15/21^(b)			486		489,037
Mallinckrodt International Finance SA/Mallinckrodt CB LLC^(b):
5.75%, 08/01/22			12		10,380
5.63%, 10/15/23^(f)			142		117,328
Medtronic, Inc., 4.50%, 03/15/42			750		782,911
Teleflex, Inc., 5.25%, 06/15/24			170		171,700

					3,852,586
Health Care Providers & Services — 1.5%
Acadia Healthcare Co., Inc.:
5.63%, 02/15/23			50		50,563
6.50%, 03/01/24			198		204,930
Aetna, Inc., 4.50%, 05/15/42			575		568,831
Amsurg Corp., 5.63%, 07/15/22			2		2,038
Centene Corp.:
5.63%, 02/15/21			227		233,063
6.13%, 02/15/24			359		377,399
Centene Escrow I Corp., 5.38%, 06/01/26^(b)			858		867,181
CHS/Community Health Systems, Inc.:
5.13%, 08/01/21			39		36,648
6.25%, 03/31/23			123		114,698
DaVita, Inc., 5.13%, 07/15/24			142		138,450
Eagle Holding Co. II LLC, (7.63% Cash or 8.38% PIK), 7.63%, 05/15/22^(b)(g)			177		179,248
Envision Healthcare Corp.^(b):
5.13%, 07/01/22			163		163,408
6.25%, 12/01/24			68		71,754
HCA, Inc.:
5.88%, 03/15/22			406		426,807
4.75%, 05/01/23			562		565,512
5.00%, 03/15/24			530		533,816
5.38%, 02/01/25			416		408,720
5.25%, 04/15/25			464		466,320
5.88%, 02/15/26			205		206,283
5.25%, 06/15/26			323		321,789
4.50%, 02/15/27			157		148,758
5.50%, 06/15/47			585		545,512
HealthSouth Corp., 5.75%, 11/01/24			26		26,390


			9

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Health Care Providers & Services (continued)
MEDNAX, Inc., 5.25%, 12/01/23^(b)		USD	90	$	88,650
Molina Healthcare, Inc., 4.88%, 06/15/25^(b)			71		67,450
MPH Acquisition Holdings LLC, 7.13%, 06/01/24^(b)			273		283,237
Northwell Healthcare, Inc., 4.26%, 11/01/47			725		700,349
NVA Holdings, Inc., 6.88%, 04/01/26^(b)			190		187,207
Polaris Intermediate Corp., (8.50% Cash), 8.50%, 12/01/22^(b)(g)			588		607,845
Regional Care Hospital Partners Holdings, Inc., 8.25%, 05/01/23^(b)			97		101,729
Sterigenics-Nordion Holdings LLC, 6.50%, 05/15/23^(b)			137		138,713
Surgery Center Holdings, Inc.^(b):
8.88%, 04/15/21			98		100,450
6.75%, 07/01/25^(f)			183		170,647
Team Health Holdings, Inc., 6.38%, 02/01/25^(b)(f)			267		231,622
Tenet Healthcare Corp.:
6.00%, 10/01/20			261		269,482
7.50%, 01/01/22^(b)			118		123,629
8.13%, 04/01/22			802		839,092
6.75%, 06/15/23			268		266,660
4.63%, 07/15/24^(b)			474		455,632
Vizient, Inc., 10.38%, 03/01/24^(b)			228		250,800
WellCare Health Plans, Inc., 5.25%, 04/01/25			58		57,855

					11,599,167
Health Care Technology — 0.0%
Change Healthcare Holdings LLC/Change Healthcare Finance, Inc., 5.75%, 03/01/25^(b)			166		158,738
Quintiles IMS, Inc., 3.25%, 03/15/25^(b)		EUR	100		115,286

					274,024
Hotels, Restaurants & Leisure — 2.4%
Arcos Dorados Holdings, Inc., 5.88%, 04/04/27^(b)		USD	257		253,145
Boyne USA, Inc., 7.25%, 05/01/25^(b)			57		59,280
Burger King France SAS (3 mo. Euribor + 5.25%), 5.25%, 05/01/23^(a)		EUR	100		117,700
Churchill Downs, Inc., 4.75%, 01/15/28^(b)		USD	48		44,760
Codere Finance 2 Luxembourg SA, 6.75%, 11/01/21		EUR	100		113,140
CPUK Finance Ltd., 4.25%, 02/28/47		GBP	100		133,612
CRC Escrow Issuer LLC/CRC Finco, Inc., 5.25%, 10/15/25^(b)		USD	134		127,970
Eldorado Resorts, Inc., 6.00%, 04/01/25			67		66,665
ESH Hospitality, Inc., 5.25%, 05/01/25^(b)			142		136,405


Security	Par (000)			Value
Hotels, Restaurants & Leisure (continued)
GLP Capital LP/GLP Financing II, Inc.:
5.38%, 11/01/23		USD	90	$	92,700
5.25%, 06/01/25			26		26,046
5.38%, 04/15/26			42		41,674
Golden Nugget, Inc., 6.75%, 10/15/24^(b)			217		219,441
International Game Technology PLC, 4.75%, 02/15/23		EUR	100		125,899
IRB Holding Corp., 6.75%, 02/15/26^(b)		USD	100		94,500
KFC Holding Co./Pizza Hut Holdings LLC/Taco Bell of America LLC^(b):
5.25%, 06/01/26			73		71,357
4.75%, 06/01/27			18		16,920
McDonald’s Corp., 3.70%, 01/30/26			510		510,877
Melco Resorts Finance Ltd., 4.88%, 06/06/25^(b)			250		236,678
MGM Resorts International:
5.25%, 03/31/20			87		88,849
6.75%, 10/01/20			37		39,037
6.63%, 12/15/21			635		673,100
7.75%, 03/15/22			171		187,245
4.63%, 09/01/26			12		11,100
New Red Finance, Inc.^(b):
4.25%, 05/15/24			171		162,022
5.00%, 10/15/25			1,098		1,040,355
Sabre GLBL, Inc.^(b):
5.38%, 04/15/23			62		62,632
5.25%, 11/15/23			133		133,319
Scientific Games International, Inc.:
10.00%, 12/01/22			770		825,833
5.00%, 10/15/25^(b)			280		270,200
Six Flags Entertainment Corp., 4.88%, 07/31/24^(b)			280		270,200
Station Casinos LLC, 5.00%, 10/01/25^(b)			177		170,097
Unique Pub Finance Co. PLC:
Series A3, 6.54%, 03/30/21		GBP	1,740		2,437,488
Series A4, 5.66%, 06/30/27			1,011		1,483,607
Series M, 7.40%, 03/28/24			3,000		4,392,931
Series N, 6.46%, 03/30/32			2,390		3,092,280
Vue International Bidco PLC, 7.88%, 07/15/20			100		133,766
Wyndham Hotels & Resorts, Inc., 5.38%, 04/15/26^(b)		USD	76		75,810
Wyndham Worldwide Corp.:
4.15%, 04/01/24			86		85,042
5.10%, 10/01/25			10		10,339
4.50%, 04/01/27			34		33,568
Wynn Macau Ltd., 5.50%, 10/01/27^(b)			400		386,000


10

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Hotels, Restaurants & Leisure (continued)
Yum! Brands, Inc., 3.88%, 11/01/23		USD	27	$	25,785

					18,579,374
Household Durables — 0.5%
Algeco Scotsman Global Finance PLC, 8.00%, 02/15/23^(b)			400		399,000
Brookfield Residential Properties, Inc., 6.38%, 05/15/25^(b)			47		47,353
Century Communities, Inc., 6.88%, 05/15/22			375		385,942
K Hovnanian Enterprises, Inc., 10.00%, 07/15/22^(b)			143		151,937
Lennar Corp.:
8.38%, 01/15/21^(b)			53		58,300
6.25%, 12/15/21^(b)			196		205,310
4.13%, 01/15/22			77		75,989
5.38%, 10/01/22^(b)			2		2,050
4.75%, 11/15/22			136		135,334
4.88%, 12/15/23			85		84,788
4.75%, 05/30/25			90		87,300
5.25%, 06/01/26^(b)			18		17,640
4.75%, 11/29/27^(b)			185		172,512
Mattamy Group Corp.^(b):
6.88%, 12/15/23			94		96,702
6.50%, 10/01/25			129		127,513
MDC Holdings, Inc., 6.00%, 01/15/43			130		116,512
Meritage Homes Corp., 5.13%, 06/06/27			52		48,620
Newell Brands, Inc., 4.20%, 04/01/26			1,000		983,199
PulteGroup, Inc., 6.38%, 05/15/33			216		220,320
Tempur Sealy International, Inc.:
5.63%, 10/15/23			2		2,020
5.50%, 06/15/26			67		64,655
TRI Pointe Group, Inc.:
4.38%, 06/15/19			10		10,000
4.88%, 07/01/21			73		73,183
5.88%, 06/15/24			112		111,406
5.25%, 06/01/27			28		26,102
William Lyon Homes, Inc.:
6.00%, 09/01/23^(b)			40		39,950
5.88%, 01/31/25			66		62,763

					3,806,400
Household Products — 0.0%
ACCO Brands Corp., 5.25%, 12/15/24^(b)			59		59,000
Prestige Brands, Inc., 6.38%, 03/01/24^(b)			42		41,370
Spectrum Brands, Inc., 6.63%, 11/15/22			105		108,518

					208,888
Independent Power and Renewable Electricity Producers — 0.4%
AES Corp.:
4.50%, 03/15/23			91		91,000


Security	Par (000)			Value
Independent Power and Renewable Electricity Producers (continued)
AES Corp. (continued):
4.88%, 05/15/23		USD	124	$	124,310
6.00%, 05/15/26			112		115,500
5.13%, 09/01/27			200		197,000
Calpine Corp.:
5.38%, 01/15/23			170		161,925
5.88%, 01/15/24^(b)			173		172,568
5.25%, 06/01/26^(b)			397		375,165
Colbun SA, 3.95%, 10/11/27^(b)			200		187,625
Dynegy, Inc.:
7.38%, 11/01/22			155		162,812
5.88%, 06/01/23			26		26,683
8.00%, 01/15/25^(b)			122		132,065
8.13%, 01/30/26^(b)			115		126,069
Genneia SA, 8.75%, 01/20/22^(b)			370		373,633
NRG Energy, Inc.:
6.63%, 01/15/27			623		643,247
5.75%, 01/15/28^(b)			42		41,475
NRG Yield Operating LLC, 5.38%, 08/15/24			155		154,225
TerraForm Power Operating LLC^(b):
4.25%, 01/31/23			63		60,795
6.63%, 06/15/25^(l)			15		15,975
5.00%, 01/31/28			128		120,800

					3,282,872
Industrial Conglomerates — 0.5%
Apergy Corp., 6.38%, 05/01/26^(b)			72		73,260
BWX Technologies, Inc., 5.38%, 07/15/26^(b)			91		91,910
General Electric Co.:
6.75%, 03/15/32^(f)			2,500		3,079,965
6.88%, 01/10/39			135		172,094
Smiths Group PLC, 3.63%, 10/12/22^(b)			360		358,180
Vertiv Group Corp., 9.25%, 10/15/24^(b)			363		355,740

					4,131,149
Insurance — 2.7%
Acrisure LLC/Acrisure Finance, Inc., 7.00%, 11/15/25^(b)			126		117,495
Allied World Assurance Co. Holdings Ltd., 4.35%, 10/29/25			1,495		1,458,705
American International Group, Inc., 3.75%, 07/10/25^(f)			3,380		3,302,030
Aon PLC:
3.88%, 12/15/25			1,445		1,431,329
4.60%, 06/14/44			500		494,304
Ardonagh Midco 3 PLC:
8.38%, 07/15/23		GBP	100		137,210
8.63%, 07/15/23^(b)		USD	200		206,500
Assicurazioni Generali SpA(3 mo. Euribor + 7.11%), 7.75%, 12/12/42^(h)		EUR	100		140,551


			11

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Insurance (continued)
AssuredPartners, Inc., 7.00%, 08/15/25^(b)		USD	33	$	32,258
AXA SA(3 mo. Euribor + 3.05%), 5.25%, 04/16/40^(h)		EUR	500		632,098
Fidelity National Financial, Inc., 4.25%, 08/15/18⁽ⁱ⁾		USD	73		210,335
Five Corners Funding Trust, 4.42%, 11/15/23^(b)(f)			2,050		2,123,609
Groupama SA, 6.00%, 01/23/27		EUR	100		139,956
Hartford Financial Services Group, Inc., 5.13%, 04/15/22		USD	1,860		1,979,884
HUB International Ltd., 7.00%, 05/01/26^(b)			240		240,192
Liberty Mutual Group, Inc., 6.50%, 05/01/42^(b)(f)			2,000		2,471,658
Muenchener Rueckversicherungs AG(3 mo. Euribor + 3.50%), 6.00%, 05/26/41^(h)		EUR	400		538,845
Nationwide Building Society, 4.13%, 10/18/32^(b)(c)		USD	720		664,442
Prudential Financial, Inc.:
5.90%, 03/17/36			500		596,279
5.70%, 12/14/36^(f)			1,625		1,894,097
Teachers Insurance & Annuity Association of America, 4.27%, 05/15/47^(b)			700		688,907
USIS Merger Sub, Inc., 6.88%, 05/01/25^(b)			41		41,308
Wayne Merger Sub LLC, 8.25%, 08/01/23^(b)			625		645,313

					20,187,305
Internet Software & Services — 0.2%
Equinix, Inc.:
2.88%, 03/15/24		EUR	100		115,765
5.88%, 01/15/26		USD	273		278,119
Netflix, Inc.:
4.38%, 11/15/26			65		61,101
3.63%, 05/15/27		EUR	100		115,794
5.88%, 11/15/28^(b)		USD	207		208,097
Rackspace Hosting, Inc., 8.63%, 11/15/24^(b)			117		119,048
Symantec Corp., 5.00%, 04/15/25^(b)			124		120,058
United Group BV, 4.38%, 07/01/22		EUR	126		150,452
ZPG PLC, 3.75%, 07/15/23		GBP	100		136,956

					1,305,390
IT Services — 0.4%
Fidelity National Information Services, Inc., 4.50%, 08/15/46		USD	1,000		941,484
First Data Corp.^(b):
7.00%, 12/01/23			491		514,421


Security	Par (000)			Value
IT Services (continued)
First Data Corp.^(b) (continued):
5.00%, 01/15/24		USD	220	$	219,780
5.75%, 01/15/24^(f)			1,071		1,075,016
Gartner, Inc., 5.13%, 04/01/25^(b)			141		139,943
WEX, Inc., 4.75%, 02/01/23^(b)			277		277,692

					3,168,336
Leisure Products — 0.0%
Mattel, Inc.:
6.75%, 12/31/25^(b)			232		225,980
6.20%, 10/01/40			48		41,270
5.45%, 11/01/41			28		22,464

					289,714
Life Sciences Tools & Services — 0.2%
Thermo Fisher Scientific, Inc., 5.30%, 02/01/44			1,000		1,119,322

Machinery — 0.2%
Platin 1426 GmbH, 5.38%, 06/15/23		EUR	100		114,890
RBS Global, Inc./Rexnord LLC, 4.88%, 12/15/25^(b)		USD	153		147,262
SPX FLOW, Inc.^(b):
5.63%, 08/15/24			115		113,563
5.88%, 08/15/26			148		145,780
Terex Corp., 5.63%, 02/01/25^(b)			345		342,412
Titan Acquisition Ltd./Titan Co-Borrower LLC, 7.75%, 04/15/26^(b)			450		427,500
Wabash National Corp., 5.50%, 10/01/25^(b)			176		170,720

					1,462,127
Marine — 0.3%
Nakilat, Inc., Series A, 6.07%, 12/31/33^(b)			2,150		2,376,180

Media — 4.9%
21st Century Fox America, Inc., 7.63%, 11/30/28			385		475,360
Altice Financing SA^(b):
6.63%, 02/15/23			200		197,160
7.50%, 05/15/26			407		389,194
Altice France SA^(b):
6.00%, 05/15/22			530		528,012
7.38%, 05/01/26			1,101		1,070,722
Altice Luxembourg SA:
7.75%, 05/15/22^(b)			642		616,320
6.25%, 02/15/25		EUR	100		113,715
Altice US Finance I Corp., 5.38%, 07/15/23^(b)		USD	770		758,450
AMC Networks, Inc.:
5.00%, 04/01/24			114		110,301


12

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Media (continued)
AMC Networks, Inc. (continued):
4.75%, 08/01/25		USD	66	$	61,875
Cablevision SA, 6.50%, 06/15/21^(b)			222		222,555
Cablevision Systems Corp., 8.00%, 04/15/20			325		342,875
CBS Radio, Inc., 7.25%, 11/01/24^(b)			40		38,400
CCO Holdings LLC/CCO Holdings Capital Corp.^(b):
4.00%, 03/01/23			182		173,832
5.13%, 05/01/23			73		72,544
5.13%, 05/01/27^(f)			1,273		1,191,846
5.00%, 02/01/28			219		202,575
Cequel Communications Holdings I LLC/Cequel Capital Corp.^(b):
5.13%, 12/15/21			458		455,732
7.75%, 07/15/25			560		579,600
7.50%, 04/01/28			342		342,428
Charter Communications Operating LLC/Charter Communications Operating Capital, 4.91%, 07/23/25			4,700		4,791,869
Clear Channel International BV, 8.75%, 12/15/20^(b)			317		328,888
Clear Channel Worldwide Holdings, Inc.:
6.50%, 11/15/22^(f)			1,132		1,154,640
6.50%, 11/15/22			429		438,116
Series B, 7.63%, 03/15/20			443		443,000
Comcast Cable Communications Holdings, Inc., 9.46%, 11/15/22^(f)			2,600		3,228,797
Comcast Corp.:
6.45%, 03/15/37			790		972,610
4.60%, 08/15/45			2,000		1,955,083
CSC Holdings LLC:
10.13%, 01/15/23^(b)			990		1,097,662
5.25%, 06/01/24			398		376,190
10.88%, 10/15/25^(b)			964		1,117,035
Discovery Communications LLC:
3.25%, 04/01/23			1,850		1,806,262
3.45%, 03/15/25			210		200,736
DISH DBS Corp.:
6.75%, 06/01/21			350		350,000
5.88%, 07/15/22			470		440,860
5.00%, 03/15/23			264		227,623
5.88%, 11/15/24			36		29,914
7.75%, 07/01/26			534		461,243
DISH Network Corp., 3.38%, 08/15/26⁽ⁱ⁾			155		137,457
eircom Finance DAC, 4.50%, 05/31/22		EUR	100		119,266
GTT Communications, Inc., 7.88%, 12/31/24^(b)		USD	159		159,000
Hughes Satellite Systems Corp.:
7.63%, 06/15/21			64		68,160
5.25%, 08/01/26			214		203,568
Intelsat Jackson Holdings SA:
7.25%, 10/15/20			185		181,300


Security	Par (000)			Value
Media (continued)
Intelsat Jackson Holdings SA (continued):
5.50%, 08/01/23		USD	325	$	284,172
9.75%, 07/15/25^(b)			377		391,138
Interpublic Group of Cos., Inc., 3.75%, 02/15/23			2,000		1,995,691
LGE HoldCo VI BV, 7.13%, 05/15/24		EUR	100		125,673
MDC Partners, Inc., 6.50%, 05/01/24^(b)		USD	228		201,780
Meredith Corp., 6.88%, 02/01/26^(b)			110		111,100
Midcontinent Communications/Midcontinent Finance Corp., 6.88%, 08/15/23^(b)			148		155,770
Numericable Group SA, 5.38%, 05/15/22		EUR	106		126,708
Qualitytech LP/QTS Finance Corp., 4.75%, 11/15/25^(b)		USD	104		97,048
Radiate Holdco LLC/Radiate Finance, Inc., 6.88%, 02/15/23^(b)			43		40,850
Sirius XM Radio, Inc., 5.00%, 08/01/27^(b)			162		153,923
TCI Communications, Inc., 7.88%, 02/15/26^(f)			610		757,827
TEGNA, Inc., 5.50%, 09/15/24^(b)			45		45,225
Tele Columbus AG, 3.88%, 05/02/25		EUR	100		112,813
Telenet Finance Luxembourg Notes Sarl, 5.50%, 03/01/28^(b)		USD	200		194,034
Telesat Canada/Telesat LLC, 8.88%, 11/15/24^(b)			167		181,613
Time Warner, Inc., 6.10%, 07/15/40			830		946,681
Tribune Media Co., 5.88%, 07/15/22			16		16,180
Univision Communications, Inc.^(b):
5.13%, 05/15/23			182		172,445
5.13%, 02/15/25			52		47,887
UPCB Finance IV Ltd., 4.00%, 01/15/27		EUR	100		120,399
Viacom, Inc., 5.85%, 09/01/43		USD	645		660,699
Videotron Ltd., 5.13%, 04/15/27^(b)			222		214,785
Virgin Media Finance PLC, 5.75%, 01/15/25^(b)			315		298,069
Virgin Media Receivables Financing Notes I DAC, 5.50%, 09/15/24		GBP	100		131,626
Virgin Media Secured Finance PLC:
5.25%, 01/15/26^(b)		USD	303		284,063
4.88%, 01/15/27		GBP	100		129,947
6.25%, 03/28/29			100		139,748
Vrio Finco 1 LLC/Vrio Finco 2, Inc., 6.25%, 04/04/23^(b)		USD	786		791,895
Ziggo Bond Finance BV, 5.88%, 01/15/25^(b)			260		245,700
Ziggo Secured Finance BV, 5.50%, 01/15/27^(b)			150		143,205

					37,551,469


			13

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Metals & Mining — 1.3%
Alcoa Nederland Holding BV, 6.13%, 05/15/28^(b)		USD	200	$	205,500
Big River Steel LLC/BRS Finance Corp., 7.25%, 09/01/25^(b)			121		125,991
Cleveland-Cliffs, Inc., 4.88%, 01/15/24^(b)			131		127,971
Constellium NV^(b):
5.75%, 05/15/24			582		561,630
5.88%, 02/15/26			269		256,222
Freeport-McMoRan, Inc.:
3.10%, 03/15/20			539		531,589
4.00%, 11/14/21			121		119,790
3.55%, 03/01/22			530		512,112
3.88%, 03/15/23			639		614,245
5.40%, 11/14/34			278		255,760
5.45%, 03/15/43			577		520,742
Grinding Media, Inc./Moly-Cop AltaSteel Ltd., 7.38%, 12/15/23^(b)			299		315,589
Joseph T Ryerson & Son, Inc., 11.00%, 05/15/22^(b)			115		126,787
Novelis Corp.^(b):
6.25%, 08/15/24			613		620,724
5.88%, 09/30/26			616		603,742
Nyrstar Netherlands Holdings BV, 6.88%, 03/15/24		EUR	100		112,813
Ovako AB, 5.00%, 10/05/22			100		119,120
Rio Tinto Finance USA PLC, 4.75%, 03/22/42		USD	400		436,537
Steel Dynamics, Inc.:
5.25%, 04/15/23			235		238,819
5.50%, 10/01/24			48		48,960
4.13%, 09/15/25			142		134,190
SunCoke Energy Partners LP/SunCoke Energy Partners Finance Corp., 7.50%, 06/15/25^(b)			193		195,895
Teck Resources Ltd.:
4.50%, 01/15/21			96		96,840
3.75%, 02/01/23			392		378,774
8.50%, 06/01/24^(b)			896		991,200
5.20%, 03/01/42			312		282,360
5.40%, 02/01/43			188		173,430
ThyssenKrupp AG, 1.38%, 03/03/22		EUR	75		88,118
United States Steel Corp.:
6.88%, 08/15/25		USD	120		122,724
6.25%, 03/15/26			146		144,679
Vale Overseas Ltd., 6.25%, 08/10/26			237		256,837


Security	Par (000)			Value
Metals & Mining (continued)
VM Holdings SA, 5.38%, 05/04/27^(b)		USD	299	$	288,912

					9,608,602
Multi-Utilities — 0.1%
NGL Energy Partners LP/NGL Energy Finance Corp., 6.88%, 10/15/21			374		377,740

Multiline Retail — 0.0%
Neiman Marcus Group Ltd., 8.00%, 10/15/21^(b)			145		103,675

Offshore Drilling & Other Services — 0.0%
Entegris, Inc., 4.63%, 02/10/26^(b)			135		129,431

Oil, Gas & Consumable Fuels — 7.1%
Aker BP ASA, 5.88%, 03/31/25^(b)			162		166,860
Alta Mesa Holdings LP/Alta Mesa Finance Services Corp., 7.88%, 12/15/24			79		82,753
Anadarko Petroleum Corp., 5.55%, 03/15/26			1,500		1,625,477
Andeavor Logistics LP, Series A, 6.88% 12/31/2049^(c)(j)			232		232,046
Andeavor Logistics LP/Tesoro Logistics Finance Corp., 4.25%, 12/01/27			250		242,858
Antero Midstream Partners LP/Antero Midstream Finance Corp., 5.38%, 09/15/24			35		34,300
Antero Resources Corp.:
5.13%, 12/01/22			52		52,260
5.63%, 06/01/23			51		51,765
Ascent Resources Utica Holdings LLC/ARU Finance Corp., 10.00%, 04/01/22^(b)			139		149,772
Berry Petroleum Co. LLC, 7.00%, 02/15/26^(b)			57		57,998
California Resources Corp., 8.00%, 12/15/22^(b)			195		172,103
Callon Petroleum Co.:
6.13%, 10/01/24			174		175,522
6.38%, 07/01/26^(b)			100		100,000
Calumet Specialty Products Partners LP/Calumet Finance Corp.:
6.50%, 04/15/21			18		17,708
7.63%, 01/15/22			92		90,965
Canadian Natural Resources Ltd., 3.90%, 02/01/25			500		497,913
Carrizo Oil & Gas, Inc.:
6.25%, 04/15/23			133		134,663
8.25%, 07/15/25			117		124,605
Cenovus Energy, Inc., 4.25%, 04/15/27			400		385,177
Cheniere Corpus Christi Holdings LLC:
7.00%, 06/30/24			178		194,912


14

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Oil, Gas & Consumable Fuels (continued)
Cheniere Corpus Christi Holdings LLC (continued):
5.88%, 03/31/25		USD	279	$	291,206
5.13%, 06/30/27			182		180,862
Cheniere Energy Partners LP, 5.25%, 10/01/25^(b)			261		253,822
Chesapeake Energy Corp.^(f):
8.00%, 01/15/25			68		67,575
8.00%, 06/15/27			523		519,077
Cia Latinoamericana de Infraestructura & Servicios SA, 9.50%, 07/20/23^(b)			370		320,050
Citgo Holding, Inc., 10.75%, 02/15/20^(b)			95		101,413
CNX Resources Corp., 5.88%, 04/15/22^(f)			1,321		1,332,559
ConocoPhillips Canada Funding Co., 5.95%, 10/15/36			685		838,217
ConocoPhillips Co., 6.50%, 02/01/39			600		777,989
CONSOL Energy, Inc.:
8.00%, 04/01/23			19		20,188
11.00%, 11/15/25^(b)			266		291,602
Covey Park Energy LLC/Covey Park Finance Corp., 7.50%, 05/15/25^(b)			359		355,410
Crestwood Midstream Partners LP/Crestwood Midstream Finance Corp., 6.25%, 04/01/23			20		20,350
CrownRock LP/CrownRock Finance, Inc., 5.63%, 10/15/25^(b)			476		462,920
DCP Midstream LLC^(b):
4.75%, 09/30/21			55		55,688
6.45%, 11/03/36			128		136,000
6.75%, 09/15/37			119		127,181
Denbury Resources, Inc., 9.25%, 03/31/22^(b)			332		352,750
Devon Energy Corp., 5.85%, 12/15/25			1,000		1,112,310
Diamond Offshore Drilling, Inc., 7.88%, 08/15/25			62		64,015
Diamondback Energy, Inc.:
4.75%, 11/01/24			36		34,740
5.38%, 05/31/25^(b)			34		33,575
5.38%, 05/31/25			87		86,130
Eclipse Resources Corp., 8.88%, 07/15/23			45		42,300
Enbridge, Inc., 6.25%, 03/01/78^(c)			1,935		1,864,663
Endeavor Energy Resources LP/EER Finance, Inc.^(b):
5.50%, 01/30/26			53		51,940
5.75%, 01/30/28			120		117,900
Energy Transfer Equity LP:
4.25%, 03/15/23			166		160,812
5.88%, 01/15/24			160		166,000
5.50%, 06/01/27			102		103,403


Security	Par (000)			Value
Oil, Gas & Consumable Fuels (continued)
Energy Transfer Partners LP:
4.05%, 03/15/25		USD	500	$	484,117
4.75%, 01/15/26			1,250		1,251,941
5.30%, 04/15/47			540		496,678
Ensco Jersey Finance Ltd., 3.00%, 01/31/24⁽ⁱ⁾			165		148,247
Enterprise Products Operating LLC, 3.70%, 02/15/26			500		494,245
EOG Resources, Inc.:
4.15%, 01/15/26			1,000		1,023,881
5.10%, 01/15/36			200		218,340
EP Energy LLC/Everest Acquisition Finance, Inc.:
9.38%, 05/01/20			6		5,850
9.38%, 05/01/24^(b)			262		205,749
8.00%, 11/29/24^(b)			21		20,790
7.75%, 05/15/26^(b)			369		375,457
Extraction Oil & Gas, Inc.^(b):
7.38%, 05/15/24			181		189,597
5.63%, 02/01/26			209		200,117
Genesis Energy LP/Genesis Energy Finance Corp.:
6.50%, 10/01/25			59		56,788
6.25%, 05/15/26			112		105,280
GNL Quintero SA, 4.63%, 07/31/29^(b)			200		195,600
Great Western Petroleum LLC/Great Western Finance, Inc., 9.00%, 09/30/21^(b)			350		359,625
Gulfport Energy Corp.:
6.63%, 05/01/23			115		115,575
6.38%, 05/15/25			41		39,360
6.38%, 01/15/26			12		11,460
Halcon Resources Corp., Series WI, 6.75%, 02/15/25			442		415,480
Hess Corp., 4.30%, 04/01/27			1,100		1,076,364
Hess Infrastructure Partners LP/Hess Infrastructure Partners Finance Corp., 5.63%, 02/15/26^(b)			178		178,890
Indigo Natural Resources LLC, 6.88%, 02/15/26^(b)			67		63,985
Jagged Peak Energy LLC, 5.88%, 05/01/26^(b)			117		115,538
KeySpan Gas East Corp., 5.82%, 04/01/41^(b)(f)			1,010		1,251,263
Kinder Morgan, Inc.:
4.30%, 06/01/25			1,750		1,750,654
5.05%, 02/15/46			1,750		1,703,475
Marathon Petroleum Corp., 6.50%, 03/01/41^(f)			2,049		2,476,635
Matador Resources Co., 6.88%, 04/15/23			142		148,567
MEG Energy Corp.^(b):
6.38%, 01/30/23			1		903


			15

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Oil, Gas & Consumable Fuels (continued)
MEG Energy Corp.^(b) (continued):
7.00%, 03/31/24		USD	172	$	155,230
6.50%, 01/15/25			364		364,797
MidAmerican Energy Co., 5.80%, 10/15/36^(f)			1,500		1,845,623
MidAmerican Energy Holdings Co., 5.95%, 05/15/37			1,750		2,181,056
Murphy Oil Corp.:
6.88%, 08/15/24			117		124,020
5.75%, 08/15/25			14		13,965
5.88%, 12/01/42			31		28,311
Nabors Industries, Inc.:
0.75%, 01/15/24⁽ⁱ⁾			262		206,381
5.75%, 02/01/25^(b)			110		104,225
New Enterprise Stone & Lime Co., Inc., 6.25%, 03/15/26^(b)			53		53,265
Newfield Exploration Co.:
5.63%, 07/01/24			22		23,203
5.38%, 01/01/26			181		186,204
NGPL PipeCo LLC^(b):
4.38%, 08/15/22			82		81,898
4.88%, 08/15/27			90		87,381
7.77%, 12/15/37			263		309,025
Noble Holding International Ltd.:
7.75%, 01/15/24^(f)			265		246,562
7.95%, 04/01/25			37		33,759
7.88%, 02/01/26^(b)			414		421,762
Oasis Petroleum, Inc.:
6.88%, 01/15/23			13		13,195
2.63%, 09/15/23⁽ⁱ⁾			410		529,579
Paramount Resources Ltd., 6.88%, 06/30/23^(b)			197		203,895
Parkland Fuel Corp., 6.00%, 04/01/26^(b)			33		32,670
Parsley Energy LLC/Parsley Finance Corp.^(b):
6.25%, 06/01/24			48		49,560
5.38%, 01/15/25			144		142,200
5.25%, 08/15/25			52		50,440
5.63%, 10/15/27			19		18,763
PBF Holding Co. LLC/ PBF Finance Corp., 7.25%, 06/15/25			143		148,320
PDC Energy, Inc.:
6.13%, 09/15/24			24		24,420
5.75%, 05/15/26^(b)			81		80,190
Petrobras Global Finance BV:
8.75%, 05/23/26			222		245,754
6.00%, 01/27/28^(b)			239		221,314
Petroleos Mexicanos:
5.38%, 03/13/22			27		27,673
6.50%, 03/13/27			148		150,701
5.35%, 02/12/28^(b)			123		115,497


Security	Par (000)			Value
Oil, Gas & Consumable Fuels (continued)
Plains All American Pipeline LP/PAA Finance Corp., 3.65%, 06/01/22		USD	1,000	$	986,683
Precision Drilling Corp., 7.13%, 01/15/26^(b)			159		162,180
QEP Resources, Inc.:
6.88%, 03/01/21			13		13,780
5.38%, 10/01/22			200		203,440
5.63%, 03/01/26			156		148,980
Range Resources Corp.:
5.88%, 07/01/22			181		182,357
4.88%, 05/15/25			208		195,520
Resolute Energy Corp., 8.50%, 05/01/20			279		279,349
Rockies Express Pipeline LLC^(b):
5.63%, 04/15/20			440		451,968
6.88%, 04/15/40			229		263,350
Rowan Cos., Inc.:
4.88%, 06/01/22			50		46,813
4.75%, 01/15/24			46		39,445
7.38%, 06/15/25			284		271,930
RSP Permian, Inc., 6.63%, 10/01/22			139		144,908
Sabine Pass Liquefaction LLC, 5.88%, 06/30/26			1,750		1,897,877
Sanchez Energy Corp.:
7.75%, 06/15/21			683		587,161
6.13%, 01/15/23			128		84,160
7.25%, 02/15/23^(b)			84		82,425
SESI LLC, 7.13%, 12/15/21			60		61,125
Seven Generations Energy Ltd., 5.38%, 09/30/25^(b)			253		244,145
SM Energy Co.:
6.50%, 11/15/21			50		50,875
6.50%, 01/01/23			129		130,935
5.00%, 01/15/24			94		88,125
5.63%, 06/01/25^(f)			149		142,668
6.75%, 09/15/26			92		93,610
Southwestern Energy Co.:
6.45%, 01/23/25^(c)			124		121,830
7.50%, 04/01/26			119		123,167
7.75%, 10/01/27			158		165,110
Suncor Energy, Inc., 6.50%, 06/15/38			1,000		1,278,418
Sunoco Logistics Partners Operations LP, 3.90%, 07/15/26			310		292,041
Sunoco LP/Sunoco Finance Corp.^(b):
4.88%, 01/15/23			253		241,618
5.88%, 03/15/28			4		3,758
Tallgrass Energy Partners LP/Tallgrass Energy Finance Corp.^(b):
5.50%, 09/15/24			325		326,625
5.50%, 01/15/28			212		204,845
Targa Resources Partners LP/Targa Resources Partners Finance Corp.:
5.25%, 05/01/23			10		10,075


16

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Oil, Gas & Consumable Fuels (continued)
Targa Resources Partners LP/Targa Resources Partners Finance Corp. (continued):
5.13%, 02/01/25		USD	77	$	76,038
5.88%, 04/15/26^(b)			296		297,388
5.00%, 01/15/28^(b)			163		153,171
TransCanada PipeLines Ltd., 4.63%, 03/01/34			500		506,598
Transportadora de Gas del Sur SA, 6.75%, 05/02/25^(b)			249		239,040
Western Gas Partners LP, 5.38%, 06/01/21			1,425		1,481,859
Whiting Petroleum Corp., 6.63%, 01/15/26^(b)			205		209,869
WildHorse Resource Development Corp.:
6.88%, 02/01/25^(b)			100		102,125
6.88%, 02/01/25			100		102,125
Williams Cos., Inc.:
8.75%, 03/15/32			120		156,000
5.75%, 06/24/44			251		262,922
Williams Partners LP:
3.90%, 01/15/25			1,150		1,123,964
4.00%, 09/15/25			750		734,894
WPX Energy, Inc.:
6.00%, 01/15/22			28		29,400
8.25%, 08/01/23			45		51,075
5.25%, 09/15/24			107		105,930
5.75%, 06/01/26			120		119,773
YPF SA, 8.50%, 07/28/25			370		374,625

					54,381,685
Oil: Crude Producers — 0.0%
MGM Growth Properties Operating Partnership LP/MGP Finance Co-Issuer, Inc., 4.50%, 01/15/28			235		210,912

Paper & Forest Products — 0.2%
International Paper Co., 6.00%, 11/15/41			870		985,931
Norbord, Inc., 6.25%, 04/15/23^(b)			120		125,433

					1,111,364
Pharmaceuticals — 2.3%
AbbVie, Inc.:
3.60%, 05/14/25			870		848,170
3.20%, 05/14/26			500		470,370
4.45%, 05/14/46			2,095		2,029,513
Actavis Funding SCS:
3.80%, 03/15/25			3,250		3,162,052
4.55%, 03/15/35			2,140		2,053,414
Charles River Laboratories International, Inc., 5.50%, 04/01/26^(b)			91		91,341


Security	Par (000)			Value
Pharmaceuticals (continued)
CVS Health Corp.:
5.13%, 07/20/45		USD	700	$	725,375
5.05%, 03/25/48			1,221		1,252,239
Endo Finance LLC/Endo Finco, Inc.^(b):
5.38%, 01/15/23			62		46,016
6.00%, 07/15/23			315		231,525
Forest Laboratories LLC, 5.00%, 12/15/21^(b)			758		787,298
inVentiv Group Holdings, Inc./inVentiv Health, Inc./inVentiv Health Clinical, Inc., 7.50%, 10/01/24^(b)			108		113,940
Jaguar Holding Co. II/Pharmaceutical Product Development LLC, 6.38%, 08/01/23^(b)			690		693,623
Mylan NV, 3.95%, 06/15/26			750		714,586
Nidda Healthcare Holding AG, 3.50%, 09/30/24		EUR	100		113,398
Synlab Bondco PLC, 6.25%, 07/01/22			100		120,266
Teva Pharmaceutical Finance Netherlands III BV, 1.70%, 07/19/19		USD	305		298,025
Valeant Pharmaceuticals International, Inc.:
7.50%, 07/15/21^(b)			60		61,125
6.75%, 08/15/21^(b)			301		304,100
5.63%, 12/01/21^(b)			261		258,651
6.50%, 03/15/22^(b)			56		58,195
7.25%, 07/15/22^(b)			8		8,122
5.50%, 03/01/23^(b)			297		276,462
4.50%, 05/15/23		EUR	176		194,486
5.88%, 05/15/23^(b)		USD	1,023		966,735
7.00%, 03/15/24^(b)			320		335,200
6.13%, 04/15/25^(b)			242		223,850
5.50%, 11/01/25^(b)			527		517,119
9.25%, 04/01/26^(b)			67		70,325
8.50%, 01/31/27^(b)(d)			523		532,479

					17,558,000
Real Estate Investment Trusts (REITs) — 1.2%
ERP Operating LP, 4.50%, 06/01/45			1,155		1,175,665
Five Point Operating Co. LP/Five Point Capital Corp., 7.88%, 11/15/25^(b)			102		104,040
GEO Group, Inc.:
5.13%, 04/01/23			105		103,262
5.88%, 10/15/24			108		106,658
6.00%, 04/15/26			40		39,100
HCP, Inc., 4.00%, 06/01/25^(f)			2,000		1,967,206
Hilton Domestic Operating Co., Inc.:
4.25%, 09/01/24			127		120,968
5.13%, 05/01/26^(b)			155		150,931
Hilton Worldwide Finance LLC/Hilton Worldwide Finance Corp., 4.63%, 04/01/25			18		17,370


			17

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Real Estate Investment Trusts (REITs) (continued)
iStar, Inc.:
4.63%, 09/15/20		USD	25	$	24,656
6.00%, 04/01/22			96		96,000
5.25%, 09/15/22			67		65,074
MGM Growth Properties Operating Partnership LP/MGP Finance Co-Issuer, Inc.:
5.63%, 05/01/24			862		870,620
4.50%, 09/01/26			269		246,807
MPT Operating Partnership LP/MPT Finance Corp., 5.00%, 10/15/27			73		68,624
NH Hotel Group SA, 3.75%, 10/01/23		EUR	128		155,363
Simon Property Group LP, 4.75%, 03/15/42		USD	1,670		1,741,107
Starwood Property Trust, Inc.:
5.00%, 12/15/21			220		223,300
4.75%, 03/15/25^(b)			68		65,430
Trust F/1401, 6.95%, 01/30/44			476		466,528
Ventas Realty LP, 4.13%, 01/15/26			870		863,306
Ventas Realty LP/Ventas Capital Corp., 4.75%, 06/01/21			550		570,258
VICI Properties 1 LLC/VICI FC, Inc., 8.00%, 10/15/23			100		111,118

					9,353,391
Real Estate Management & Development — 0.7%
ADLER Real Estate AG:
1.88%, 04/27/23		EUR	100		114,435
2.13%, 02/06/24			100		114,261
3.00%, 04/27/26			100		115,507
Greystar Real Estate Partners LLC, 5.75%, 12/01/25^(b)		USD	124		120,900
Howard Hughes Corp., 5.38%, 03/15/25^(b)			103		99,524
Northwest Florida Timber Finance LLC, 4.75%, 03/04/29^(b)(f)			4,600		4,432,100
Realogy Group LLC/Realogy Co-Issuer Corp.^(b):
5.25%, 12/01/21			48		48,360
4.88%, 06/01/23			109		102,460
RESIDOMO Sro, 3.38%, 10/15/24		EUR	100		116,027

					5,263,574
Road & Rail — 1.2%
Avis Budget Car Rental LLC/Avis Budget Finance, Inc., 5.13%, 06/01/22^(b)		USD	176		172,726
Burlington Northern Santa Fe LLC, 5.75%, 05/01/40^(f)			1,890		2,292,987
CSX Corp., 4.75%, 05/30/42			350		363,837
EC Finance PLC, 2.38%, 11/15/22		EUR	100		116,266


Security	Par (000)			Value
Road & Rail (continued)
Flexi-Van Leasing, Inc., 10.00%, 02/15/23^(b)		USD	122	$	115,290
Herc Rentals, Inc.^(b):
7.50%, 06/01/22			194		205,155
7.75%, 06/01/24			82		88,150
Hertz Corp., 7.63%, 06/01/22^(b)			183		178,882
Hertz Holdings Netherlands BV, 5.50%, 03/30/23		EUR	100		115,291
Lima Metro Line 2 Finance Ltd., 5.88%, 07/05/34^(b)		USD	5,000		5,021,300
Loxam SAS, 3.50%, 05/03/23		EUR	100		120,389
United Rentals North America, Inc.:
4.63%, 07/15/23		USD	72		72,540
4.63%, 10/15/25			117		112,431
5.88%, 09/15/26			77		78,732

					9,053,976
Semiconductors & Semiconductor Equipment — 0.8%
Advanced Micro Devices, Inc., 7.50%, 08/15/22			51		55,723
Analog Devices, Inc.:
3.90%, 12/15/25			470		469,884
3.50%, 12/05/26			345		332,067
Broadcom Corp./Broadcom Cayman Finance Ltd., 3.88%, 01/15/27			2,850		2,720,906
Microchip Technology, Inc., 1.63%, 02/15/25⁽ⁱ⁾			351		666,144
Micron Technology, Inc., 5.50%, 02/01/25			7		7,282
Microsemi Corp., 9.13%, 04/15/23^(b)			14		15,488
NXP BV/NXP Funding LLC^(b):
4.13%, 06/01/21			278		280,113
3.88%, 09/01/22			200		198,625
ON Semiconductor Corp., 1.00%, 12/01/20⁽ⁱ⁾			383		561,606
QUALCOMM, Inc., 4.65%, 05/20/35			250		254,858
Sensata Technologies BV, 5.00%, 10/01/25^(b)			227		227,567

					5,790,263
Software — 1.8%
ACI Worldwide, Inc., 6.38%, 08/15/20^(b)			320		322,400
BMC Software Finance, Inc., 8.13%, 07/15/21^(b)			177		181,443
CA, Inc., 3.60%, 08/15/22			705		705,701
CDK Global, Inc., 4.88%, 06/01/27			174		163,995
Citrix Systems, Inc., 0.50%, 04/15/19⁽ⁱ⁾			99		144,853
Genesys Telecommunications Laboratories Inc/Greeneden Lux 3 Sarl/Greeneden US Holdings LLC, 10.00%, 11/30/24^(b)			552		610,650


18

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Software (continued)
Infinity Acquisition LLC/Infinity Acquisition Finance Corp., 7.25%, 08/01/22^(b)		USD	31	$	31,736
Infor Software Parent LLC/Infor Software Parent, Inc., (7.13% Cash or 7.88% PIK), 7.13%, 05/01/21^(b)(g)			240		241,200
Infor US, Inc., 6.50%, 05/15/22			991		1,007,104
Informatica LLC, 7.13%, 07/15/23^(b)			529		536,935
Microsoft Corp., 3.50%, 11/15/42^(f)			4,000		3,764,892
Nuance Communications, Inc.:
5.38%, 08/15/20^(b)			39		39,146
6.00%, 07/01/24			77		77,385
5.63%, 12/15/26			81		78,975
Oracle Corp., 5.38%, 07/15/40^(f)			3,025		3,576,340
PTC, Inc., 6.00%, 05/15/24			125		131,250
RP Crown Parent LLC, 7.38%, 10/15/24^(b)			261		268,830
Solera LLC/Solera Finance, Inc., 10.50%, 03/01/24^(b)			1,007		1,117,468
Sophia LP/Sophia Finance, Inc., 9.00%, 09/30/23^(b)			210		221,550
TIBCO Software, Inc., 11.38%, 12/01/21^(b)			458		498,075

					13,719,928
Specialty Retail — 0.5%
Asbury Automotive Group, Inc., 6.00%, 12/15/24			159		157,410
Catalent Pharma Solutions, Inc., 4.88%, 01/15/26^(b)			231		222,384
Group 1 Automotive, Inc.:
5.00%, 06/01/22			110		110,275
5.25%, 12/15/23^(b)			13		12,675
Hexion US Finance Corp., 6.63%, 04/15/20			78		73,612
Home Depot, Inc., 5.88%, 12/16/36			1,660		2,088,457
JC Penney Corp., Inc.:
8.13%, 10/01/19			6		6,218
6.38%, 10/15/36			14		7,840
L Brands, Inc.:
6.88%, 11/01/35			215		195,381
6.75%, 07/01/36			49		44,100
Lowe’s Cos, Inc., 4.38%, 09/15/45			1,000		1,020,852
Penske Automotive Group, Inc., 5.50%, 05/15/26			22		21,670
PVH Corp., 3.13%, 12/15/27		EUR	100		114,681

					4,075,555
Technology Hardware, Storage & Peripherals — 0.7%
Apple, Inc., 4.65%, 02/23/46^(f)		USD	2,400		2,623,285
Dell International LLC/EMC Corp.^(b):
4.42%, 06/15/21			20		20,374
7.13%, 06/15/24			338		363,169


Security	Par (000)			Value
Technology Hardware, Storage & Peripherals (continued)
Dell International LLC/EMC Corp.^(b) (continued):
6.02%, 06/15/26		USD	110	$	116,085
8.35%, 07/15/46			45		54,721
Hewlett Packard Enterprise Co., 4.90%, 10/15/25			1,500		1,544,172
Western Digital Corp., 4.75%, 02/15/26			472		464,330

					5,186,136
Textiles, Apparel & Luxury Goods — 0.0%
BiSoho SAS, 5.88%, 05/01/23		EUR	49		60,225
Springs Industries, Inc., 6.25%, 06/01/21		USD	36		36,605

					96,830
Thrifts & Mortgage Finance — 0.0%
Jerrold Finco PLC, 6.25%, 09/15/21		GBP	100		136,192
Ladder Capital Finance Holdings LLLP/Ladder Capital Finance Corp.^(b):
5.25%, 03/15/22		USD	23		23,000
5.25%, 10/01/25			139		129,617

					288,809
Tobacco — 1.5%
Altria Group, Inc.:
9.95%, 11/10/38			516		822,701
10.20%, 02/06/39			894		1,474,428
5.38%, 01/31/44^(f)			4,030		4,398,459
3.88%, 09/16/46			1,250		1,118,305
Reynolds American, Inc.:
4.45%, 06/12/25			635		643,450
7.00%, 08/04/41			1,000		1,250,869
5.85%, 08/15/45			1,500		1,676,212

					11,384,424
Transportation — 0.0%
JB Poindexter & Co., Inc., 7.13%, 04/15/26^(b)			74		75,110

Transportation Infrastructure — 0.3%
I 595 Express LLC, 3.31%, 12/31/31^(a)(e)			879		824,951
Penske Truck Leasing Co. LP/PTL Finance Corp., 3.40%, 11/15/26^(b)			490		460,124
Rumo Luxembourg Sarl, 7.38%, 02/09/24^(b)			370		382,765
Transurban Finance Co. Property Ltd., 4.13%, 02/02/26^(b)			580		579,335

					2,247,175
Utilities — 0.2%
AES Argentina Generacion SA, 7.75%, 02/02/24^(b)			370		363,044
AES Panama SRL, 6.00%, 06/25/22^(b)			228		233,130


			19

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Utilities (continued)
ContourGlobal Power Holdings SA, 5.13%, 06/15/21		EUR	100	$	118,676
Generacion Mediterranea SA/Generacion Frias SA/Central Termica Roca SA, 9.63%, 07/27/23^(b)		USD	370		383,309
Stoneway Capital Corp., 10.00%, 03/01/27^(b)(f)			530		544,893

					1,643,052
Wireless Telecommunication Services — 1.4%
CoreCivic, Inc., 4.75%, 10/15/27			120		110,100
CyrusOne LP/CyrusOne Finance Corp.:
5.00%, 03/15/24			271		271,339
5.38%, 03/15/27			35		35,175
Digicel Group Ltd., 8.25%, 09/30/20^(b)			223		168,923
Digicel Ltd., 6.00%, 04/15/21^(b)			1,550		1,420,187
Equinix, Inc., 2.88%, 10/01/25		EUR	100		112,224
Frontier Communications Corp., 8.50%, 04/01/26^(b)		USD	240		232,500
Matterhorn Telecom SA(3 mo. Euribor + 3.25%), 3.25%, 02/01/23^(a)		EUR	14		16,701
Radiate Holdco LLC/Radiate Finance, Inc., 6.63%, 02/15/25^(b)		USD	152		139,460
Rogers Communications, Inc., 7.50%, 08/15/38			2,325		3,167,861
SBA Communications Corp., 4.88%, 09/01/24			112		104,581
Sprint Capital Corp.:
6.90%, 05/01/19			140		143,836
6.88%, 11/15/28			21		20,108
8.75%, 03/15/32			177		190,496
Sprint Communications, Inc., 7.00%, 03/01/20^(b)			571		596,838
Sprint Corp.:
7.88%, 09/15/23			319		334,790
7.13%, 06/15/24			1,102		1,110,265
7.63%, 02/15/25			532		547,960
7.63%, 03/01/26			510		524,025
T-Mobile USA, Inc.:
4.00%, 04/15/22			132		131,340
6.38%, 03/01/25			205		214,205
6.50%, 01/15/26			42		43,838
4.50%, 02/01/26			426		400,440
4.75%, 02/01/28			172		160,820


Security	Par (000)			Value
Wireless Telecommunication Services (continued)
Uniti Group LP/Uniti Group Finance, Inc./CSL Capital LLC, 8.25%, 10/15/23		USD	222	$	216,383

					10,414,395

Total Corporate Bonds — 67.5% (Cost — $502,767,664)					514,591,520


Floating Rate Loan Interests^(a) — 2.2%

Aerospace & Defense — 0.1%
Accudyne Industries LLC, 2017 Term Loan, (1 mo. LIBOR + 3.25%, 1.00% Floor), 5.23%, 08/18/24			319		319,998
Sequa Mezzanine Holdings LLC, 2nd Lien Term Loan, (2 mo. LIBOR + 9.00%, 1.00% Floor), 10.97%, 04/28/22			40		39,900

					359,898
Air Freight & Logistics — 0.0%
CEVA Group PLC, Letter of Credit, (3 mo. LIBOR + 5.50%), 6.50%, 03/19/21^(e)			30		32,385
CEVA Intercompany BV, Dutch Term Loan, (3 mo. LIBOR + 5.50%, 1.00% Floor), 7.86%, 03/19/21			11		11,164
CEVA Logistics Canada ULC, Canadian Term Loan, (3 mo. LIBOR + 5.50%, 1.00% Floor), 7.86%, 03/19/21			5		5,249
CEVA Logistics US Holdings, Inc., Term Loan, (3 mo. LIBOR + 5.50%, 1.00% Floor), 7.86%, 03/19/21			47		46,184

					94,982
Auto Components — 0.0%
USI, Inc., 2017 Repriced Term Loan, (3 mo. LIBOR + 3.00%), 5.30%, 05/16/24			125		124,461

Building Products — 0.0%
Ply Gem Industries, Inc., 2018 Term Loan, (3 mo. LIBOR + 3.75%), 6.09%, 04/12/25			296		296,444

Chemicals — 0.1%
Alpha 3 BV, 2017 Term Loan B1, (3 mo. LIBOR + 3.00%, 1.00% Floor), 5.30%, 01/31/24			186		185,869
Element Materials Technology Group US Holdings, Inc., 2017 Term Loan B, (3 mo. LIBOR + 3.50%, 1.00% Floor), 5.80%, 06/28/24			35		35,043


20

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Chemicals (continued)
Invictus US LLC:
1st Lien Term Loan, (2 mo. LIBOR + 3.00%), 5.10%, 03/28/25		USD	76	$	76,639
2nd Lien Term Loan, (1 mo. LIBOR + 6.75%), 8.73%, 03/25/26			42		42,420
WR Grace & Co.:
Term Loan B1, (3 mo. LIBOR + 1.75%), 4.06%, 04/03/25			40		39,657
Term Loan B2, (3 mo. LIBOR + 1.75%), 4.06%, 04/03/25			68		67,983

					447,611
Commercial Services & Supplies — 0.0%
Asurion LLC, 2017 2nd Lien Term Loan, (1 mo. LIBOR + 6.00%), 7.98%, 08/04/25			43		44,011
West Corp.:
2017 Term Loan, (1 mo. LIBOR + 4.00% 1.00% Floor), 5.98%, 10/10/24			143		143,091
2018 Term Loan B1, (1 mo. LIBOR + 3.50% 1.00% Floor), 5.48%, 10/10/24			52		51,526

					238,628
Construction & Engineering — 0.2%
Brand Energy & Infrastructure Services, Inc., 2017 Term Loan, (3 mo. LIBOR + 4.25%, 1.00% Floor), 6.61%, 06/21/24			967		971,924
Pike Corp., 2018 Term Loan B, (1 mo. LIBOR + 3.50%, 1.00% Floor), 5.49%, 03/23/25			90		91,229
SRS Distribution Inc., 2018 1st Lien Term Loan B, (3 mo. LIBOR + 3.25%), 5.58%, 05/23/25			158		157,210

					1,220,363
Diversified Consumer Services — 0.0%
Ascend Learning LLC, 2017 Term Loan B, (1 mo. LIBOR + 3.00%, 1.00% Floor), 4.98%, 07/12/24			41		40,846


Security	Par (000)			Value
Diversified Consumer Services (continued)
Laureate Education, Inc., 2017 Term Loan B, (1 mo. LIBOR + 3.50%, 1.00% Floor), 5.48%, 04/26/24		USD	147	$	147,525

					188,371
Diversified Telecommunication Services — 0.1%
CenturyLink, Inc., 2017 Term Loan B, (1 mo. LIBOR + 2.75%), 4.73%, 01/31/25			515		508,019

Energy Equipment & Services — 0.1%
Gavilan Resources LLC, 2nd Lien Term Loan, (1 mo. LIBOR + 6.00%, 1.00% Floor), 7.93%, 03/01/24			194		189,877
Pioneer Energy Services Corp., Term Loan, (1 mo. LIBOR + 7.75%, 1.00% Floor), 9.68%, 11/08/22^(e)			420		435,750
Weatherford International Ltd., Term Loan, (1 mo. LIBOR + 1.43%), 3.42%, 07/13/20			170		168,152

					793,779
Food & Staples Retailing — 0.0%
Albertsons LLC, 2018 ABL Last Out Term Loan, 1.00%, 04/02/23⁽ⁿ⁾			73		74,056

Food Products — 0.0%
JBS USA LLC, 2017 Term Loan B, (3 mo. LIBOR + 2.50%), 4.65%, 10/30/22			241		240,751

Health Care Equipment & Supplies — 0.1%
DJO Finance LLC, 2015 Term Loan, (1 mo. LIBOR + 3.25%, 1.00% Floor), 5.40%, 06/08/20			499		499,927
Immucor, Inc., Extended Term Loan B, (3 mo. LIBOR + 5.00%, 1.00% Floor), 7.30%, 06/15/21^(e)			511		519,016
Ortho-Clinical Diagnostics SA, Term Loan B, (3 mo. LIBOR + 3.75% 1.00% Floor), 5.73%, 06/30/21			19		19,700

					1,038,643
Health Care Providers & Services — 0.1%
Quorum Health Corporation, Term Loan B, (1 mo. LIBOR + 6.75%, 1.00% Floor), 8.73%, 04/29/22			146		148,133


			21

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Health Care Providers & Services (continued)
Team Health Holdings, Inc., 1st Lien Term Loan, (1 mo. LIBOR + 2.75% 1.00% Floor), 4.73%, 02/06/24		USD	267	$	257,804

					405,937
Hotels, Restaurants & Leisure — 0.1%
Bronco Midstream Funding LLC, Term Loan B, (3 mo. LIBOR + 3.50%, 1.00% Floor), 5.83%, 08/14/23^(e)			77		77,578
GVC Holdings PLC, 2018 Term Loan, (1 mo. LIBOR + 2.50%, 1.00% Floor), 4.48%, 03/29/24			104		104,086
IRB Holding Corp., 1st Lien Term Loan, (2 mo. LIBOR + 3.25%, 1.00% Floor), 5.21%, 02/05/25			61		61,198
Wyndham Hotels & Resorts, Inc., Term Loan B, 1.00%, 03/28/25⁽ⁿ⁾			113		113,376

					356,238
Industrial Conglomerates — 0.1%
Cortes NP Acquisition Corp., 2017 Term Loan B, (1 mo. LIBOR + 4.00%, 1.00% Floor), 5.91%, 11/30/23			217		213,653
Sequa Mezzanine Holdings LLC, 1st Lien Term Loan, (3 mo. LIBOR + 5.00%, 1.00% Floor), 7.07%, 11/28/21			114		113,995

					327,648
Insurance — 0.1%
Hub International Limited, 2018 Term Loan B, (2 mo. LIBOR + 3.00%), 5.36%, 04/25/25			99		98,794
Sedgwick Claims Management Services, Inc.:
1st Lien Term Loan, (1 mo. LIBOR + 2.75%, 1.00% Floor), 4.73%, 03/01/21			231		230,494
2nd Lien Term Loan, (3 mo. LIBOR + 5.75%, 1.00% Floor), 7.80%, 02/28/22			96		96,000

					425,288
Internet Software & Services — 0.0%
TierPoint LLC, 2017 1st Lien Term Loan, (1 mo. LIBOR + 3.75%, 1.00% Floor), 5.73%, 05/06/24			104		100,652

IT Services — 0.0%
Access CIG LLC:
2018 1st Lien Term Loan, (1 mo. LIBOR + 3.75%), 5.73%, 02/27/25			44		44,628


Security	Par (000)			Value
IT Services (continued)
2018 2nd Lien Term Loan, (1 mo. LIBOR + 7.75%), 9.73%, 02/27/26		USD	16	$	16,148
Blackhawk Network Holdings, Inc, 2018 1st Lien Term Loan, 1.00%, 05/23/25⁽ⁿ⁾			106		106,000
Peak 10 Holding Corp.:
2017 1st Lien Term Loan, (3 mo. LIBOR + 3.50%, 1.00% Floor), 5.80%, 08/01/24			102		99,872
2nd Lien Term Loan, (3 mo. LIBOR + 7.25%, 1.00% Floor), 9.61%, 08/01/25			43		43,202

					309,850
Machinery — 0.1%
Hayward Industries, Inc., 1st Lien Term Loan, (1 mo. LIBOR + 3.50%), 5.48%, 08/05/24			38		37,999
Titan Acquisition Ltd., 2018 Term Loan B, (2 mo. LIBOR + 3.00%), 5.06%, 03/28/25			331		328,471

					366,470
Media — 0.4%
Charter Communications Operating LLC, 2017 Term Loan A2, (1 mo. LIBOR + 1.50%), 3.49%, 03/31/23			950		948,788
Intelsat Jackson Holdings SA:
2017 Term Loan B3, (1 mo. LIBOR + 3.75%, 1.00% Floor), 5.72%, 11/27/23			64		64,593
2017 Term Loan B4, (1 mo. LIBOR + 4.50%, 1.00% Floor), 6.47%, 01/02/24			198		204,754
2017 Term Loan B5, (Fixed + 6.62%), 6.63%, 01/02/24			1,101		1,117,529
PSAV Holdings LLC:
2018 1st Lien Term Loan, (1 mo. LIBOR + 3.25%, 1.00% Floor), 5.22%, 03/01/25			91		90,659
2018 2nd Lien Term Loan, (3 mo. LIBOR + 7.25%, 1.00% Floor), 9.26%, 09/01/25			74		73,445
Stars Group Holdings B.V. (The), 2018 USD Term Loan B, (3 mo. LIBOR + 3.00%), 5.32%, 04/06/25			540		540,108


22

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Media (continued)
Unitymedia Hessen GmbH & Co. KG, 2018 Term Loan B, 1.00%, 05/24/23⁽ⁿ⁾		USD	116	$	115,879

					3,155,756
Multiline Retail — 0.0%
Neiman Marcus Group, Inc., 2020 Term Loan, (1 mo. LIBOR + 3.25%, 1.00% Floor), 5.17%, 10/25/20			186		164,803

Oil & Gas Equipment & Services — 0.1%
McDermott Technology Americas, Inc., 2018 1st Lien Term Loan, (1 mo. LIBOR + 5.00%, 1.00% Floor), 6.91%, 05/10/25			1,046		1,054,086

Oil, Gas & Consumable Fuels — 0.3%
Brazos Delaware II, LLC, Term Loan B, (1 mo. LIBOR + 4.00%), 5.95%, 05/21/25			57		56,857
California Resources Corp., 2017 1st Lien Term Loan, (1 mo. LIBOR + 4.75%), 6.70%, 12/31/22			496		506,952
Chesapeake Energy Corp., Term Loan, (1 mo. LIBOR + 7.50%, 1.00% Floor), 9.47%, 08/23/21			1,005		1,054,936
CONSOL Energy, Inc., 1st Lien Term Loan B, (3 mo. LIBOR + 6.00%, 1.00% Floor), 8.32%, 10/26/22			216		221,472
Lucid Energy Group II LLC, 2018 1st Lien Term Loan, (1 mo. LIBOR + 3.00%, 1.00% Floor), 4.93%, 02/17/25^(e)			66		65,340
Medallion Midland Acquisition LLC, 1st Lien Term Loan, (1 mo. LIBOR + 3.25%, 1.00% Floor), 5.23%, 10/30/24^(e)			78		76,541
Vine Oil & Gas LP, Term Loan B, (1 mo. LIBOR + 6.87%, 1.00% Floor), 8.86%, 12/12/21^(e)			189		188,527

					2,170,625
Pharmaceuticals — 0.1%
Amneal Pharmaceuticals LLC, 2018 Term Loan B, (3 mo. LIBOR + 3.50%), 5.63%, 05/04/25			384		383,040


Security	Par (000)			Value
Pharmaceuticals (continued)
Endo Luxembourg Finance Company I Sarl, 2017 Term Loan B, (1 mo. LIBOR + 4.25%), 6.25%, 04/29/24		USD	395	$	390,268

					773,308
Semiconductors & Semiconductor Equipment — 0.0%
Microchip Technology Incorporated, 2018 Term Loan B, 1.00%, 05/29/25⁽ⁿ⁾			256		257,344

Software — 0.1%
Applied Systems, Inc.:
2017 1st Lien Term Loan, (3 mo. LIBOR + 3.00%, 1.00% Floor), 5.30%, 09/19/24			22		21,862
2017 2nd Lien Term Loan, (3 mo. LIBOR + 7.00%, 1.00% Floor), 9.30%, 09/19/25			21		21,696
Cypress Intermediate Holdings III, Inc., 2017 1st Lien Term Loan, (1 mo. LIBOR + 3.00%, 1.00% Floor), 4.99%, 04/27/24			75		75,036
Digicel International Finance Ltd., 2017 Term Loan B, (3 mo. LIBOR + 3.25%), 5.61%, 05/28/24			152		148,271
Kronos, Inc., 2nd Lien Term Loan, (3 mo. LIBOR + 8.25%, 1.00% Floor), 10.61%, 11/01/24			352		364,837
Mitchell International, Inc.:
2017 1st Lien Term Loan, (1 mo. LIBOR + 3.25%, 1.00% Floor), 5.23%, 11/29/24			96		95,644
2017 2nd Lien Term Loan, (1 mo. LIBOR + 7.25%), 9.23%, 11/20/25			101		101,589
2017 Delayed Draw Term Loan, (1 mo. LIBOR + 3.25%), 5.22%, 11/29/24			8		7,928


			23

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Software (continued)
Tempo Acquisition LLC, Term Loan, (1 mo. LIBOR + 3.00%), 4.98%, 05/01/24		USD	92	$	91,978

					928,841
Textiles, Apparel & Luxury Goods — 0.0%
Ascend Performance Materials Operations LLC, Term Loan B, (1 mo. LIBOR + 5.25%, 1.00% Floor), 7.31%, 08/12/22			184		184,813

Utilities — 0.0%
ExGen Renewables IV LLC, Term Loan B, (3 mo. LIBOR + 3.00%, 1.00% Floor), 5.31%, 11/28/24			54		54,141

Wireless Telecommunication Services — 0.0%
Xplornet Communications, Inc., Term Loan B, 1.00%, 09/09/21^(e)(n)			207		208,517

Total Floating Rate Loan Interests — 2.2% (Cost — $16,721,272)					16,870,323


Foreign Agency Obligations — 4.1%
Argentine Republic Government International Bond:
6.88%, 04/22/21			286		288,860
5.63%, 01/26/22			414		396,405
7.50%, 04/22/26^(f)			3,875		3,811,101
6.88%, 01/26/27			969		912,798
5.88%, 01/11/28			158		137,855
7.63%, 04/22/46			3,121		2,754,282
Bahrain Government International Bond, 6.75%, 09/20/29^(b)			230		197,132
Brazil Letras do Tesouro Nacional, 0.00%, 07/01/18^(k)		BRL	1,000		267,127
Brazilian Government International Bond, 6.00%, 04/07/26		USD	786		820,191
Cyprus Government International Bond, 4.63%, 02/03/20^(b)		EUR	1,210		1,499,628
Egypt Government International Bond:
5.75%, 04/29/20		USD	941		963,528
8.50%, 01/31/47^(b)			291		308,472
Iceland Government International Bond, 5.88%, 05/11/22^(f)			3,555		3,947,503
Indonesia Government International Bond:
3.75%, 04/25/22			255		252,890
4.75%, 01/08/26			380		389,092
Italian Government International Bond, 5.38%, 06/15/33			2,925		3,208,122
Lebanon Government International Bond, 6.85%, 03/23/27			242		203,808


Security	Par (000)			Value
Foreign Agency Obligations (continued)
Mexican Bonos:
8.00%, 06/11/20		MXN	3,100	$	156,467
7.50%, 06/03/27			3,500		172,083
Portugal Government International Bond, 5.13%, 10/15/24^(b)(f)		USD	3,970		4,079,969
Republic of South Africa Government International Bond:
5.50%, 03/09/20			188		193,688
5.88%, 05/30/22			1,303		1,379,468
4.88%, 04/14/26			288		280,440
Russian Federal Bond — OFZ:
6.40%, 05/27/20		RUB	24,900		396,637
7.05%, 01/19/28			43,751		692,266
Russian Foreign Bond — Eurobond:
4.25%, 06/23/27		USD	400		387,290
5.63%, 04/04/42			200		205,930
South Africa Government Bond, 6.50%, 02/28/41		ZAR	3,686		210,736
Turkey Government International Bond:
7.00%, 06/05/20		USD	674		694,890
5.63%, 03/30/21			567		568,643
5.13%, 03/25/22			739		722,225
6.25%, 09/26/22			677		686,498
7.38%, 02/05/25			105		110,158

Total Foreign Agency Obligations — 4.1% (Cost — $32,405,272)					31,296,182


Municipal Bonds — 3.2%

California — 0.9%
East Bay Municipal Utility District, RB, Build America Bonds			1,900		2,460,633
State of California, GO, Build America Bonds, Various Purpose:
7.55%, 04/01/39			280		417,004
7.63%, 03/01/40			1,720		2,548,593


24

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
California (continued)
University of California, RB, Build America Bonds		USD	885	$	1,117,109

					6,543,339
Georgia — 0.3%
Municipal Electric Authority of Georgia Plant Vogtle Units 3 & 4, Refunding RB, Build America Bonds, Series A			1,999		2,401,498

Illinois — 0.3%
State of Illinois, GO			2,000		1,925,040

Indiana — 0.4%
Indianapolis Local Public Improvement Bond Bank, RB, Build America Bonds			2,535		3,205,533

New York — 1.3%
City of New York New York Municipal Water Finance Authority, Refunding RB, 2nd General Resolution:
Series EE, 5.50%, 06/15/43			930		1,011,849
Series GG, Build America Bonds, 5.72%, 06/15/42			1,390		1,768,469
Water & Sewer System, Series EE, 5.38%, 06/15/43			770		835,004
Metropolitan Transportation Authority, RB, Build America Bonds, Series C			1,295		1,914,476
New York State Dormitory Authority, RB, Build America Bonds:
5.63%, 03/15/39			1,100		1,309,011
5.60%, 03/15/40			1,900		2,310,457
Port Authority of New York & New Jersey, RB, 159th Series			780		960,102

					10,109,368

Total Municipal Bonds — 3.2% (Cost — $20,465,732)					24,184,778


Non-Agency Mortgage-Backed Securities — 9.0%

Collateralized Mortgage Obligations — 0.4%
Banc of America Funding Corp., Series 2007-2, Class 1A2, 6.00%, 03/25/37			560		501,084
Countrywide Alternative Loan Trust:
Series 2005-64CB, Class 1A15, 5.50%, 12/25/35			1,096		1,085,239
Series 2006-OA21, Class A1, (1 mo. LIBOR US + 0.19%), 2.14%, 03/20/47^(a)			831		699,319
GMAC Mortgage Corp. Loan Trust, Series 2005-AR3, Class 5A1, 4.08%, 06/19/35^(c)			308		302,135


Security	Par (000)			Value
Collateralized Mortgage Obligations (continued)
GSR Mortgage Loan Trust:
Series 2006-4F, Class 1A1, 5.00%, 05/25/36		USD	54	$	91,377
Series 2007-4F, Class 3A1, 6.00%, 07/25/37			177		161,111
JPMorgan Mortgage Trust, Series 2006-S3, Class 1A12, 6.50%, 08/25/36			70		54,041
Merrill Lynch Mortgage Investors, Inc., Series 2006-A3, Class 3A1, 3.74%, 05/25/36^(c)			547		505,119
WaMu Mortgage Pass-Through Certificates, Series 2007-OA4, Class 1A, (12 mo. MTA + 0.77%), 2.33%, 05/25/47^(a)			199		189,161

					3,588,586
Commercial Mortgage-Backed Securities — 8.6%
Banc of America Merrill Lynch Commercial Mortgage Securities Trust, Series 2015-200P, Class C, 3.60%, 04/14/33^(b)(c)			4,170		4,108,372
Citigroup Commercial Mortgage Trust, Series 2013-GC15, Class B, 5.10%, 09/10/46^(c)			7,183		7,638,150
Citigroup/Deutsche Bank Commercial Mortgage Trust, Series 2006-CD3, Class AM, 5.65%, 10/15/48			1,577		1,630,553
Commercial Mortgage Trust:
Series 2013-300P, Class A1, 4.35%, 08/10/30^(b)			1,330		1,382,755
Series 2013-CR11, Class B, 5.16%, 08/10/50^(c)			7,000		7,332,183
Series 2013-LC6, Class B, 3.74%, 01/10/46			1,390		1,375,440
Series 2015-3BP, Class A, 3.18%, 02/10/35^(b)			7,570		7,421,790
Series 2015-CR22, Class C, 4.12%, 03/10/48^(c)			5,000		4,888,236
Series 2015-LC19, Class C, 4.26%, 02/10/48^(c)			3,500		3,466,689
Core Industrial Trust, Series 2015-TEXW, Class D, 3.85%, 02/10/34^(b)(c)			4,585		4,600,030
CSAIL Commercial Mortgage Trust, Series 2015-C1^(c):
Class B, 4.04%, 04/15/50			1,110		1,104,416
Class C, 4.30%, 04/15/50			1,000		992,806
GAHR Commercial Mortgage Trust, Series 2015-NRF, Class DFX, 3.38%, 12/15/34^(b)(c)			6,170		6,139,914
GS Mortgage Securities Corp. II, Series 2013-GC10, Class B, 3.68%, 02/10/46^(b)			2,505		2,491,419


			25

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Commercial Mortgage-Backed Securities (continued)
JPMorgan Chase Commercial Mortgage Securities Trust, Series 2016-NINE, Class A, 2.85%, 10/06/38^(b)(c)		USD	4,800	$	4,535,670
Morgan Stanley Capital I Trust, Series 2014-CPT, Class G, 3.45%, 07/13/29^(b)(c)			3,200		3,091,654
WF-RBS Commercial Mortgage Trust, Series 2012-C8:
Class B, 4.31%, 08/15/45			1,395		1,426,813
Class C, 4.89%, 08/15/45^(c)			1,795		1,820,397

					65,447,287

Total Non-Agency Mortgage-Backed Securities — 9.0% (Cost — $69,255,729)					69,035,873


Preferred Securities Capital Trusts — 11.2%

Auto Components — 0.1%
General Motors Financial Co., Inc., Series A, 5.75%,^(c)(f)(j)			264		257,070

Banks — 3.3%
ABN AMRO Bank NV, 5.75%,^(h)(j)			200		248,423
Banco Bilbao Vizcaya Argentaria SA, 6.13%,^(c)(j)			2,000		1,815,000
Banco Santander SA, 6.25%,^(h)(j)			100		119,512
BNP Paribas SA, 7.20%,^(b)(h)(j)			2,000		2,157,500
Capital One Financial Corp., Series E, 5.55%,^(h)(j)			3,500		3,578,750
CIT Group, Inc.,^(h)(j):
Series A, 5.80%			163		161,981
Series M, 6.30%,			4,000		4,080,000
Series P, 5.95% ,			2,100		2,115,750
Series Q, 5.95%			100		103,552
Series R, 6.13%			395		411,788
Cooperatieve Rabobank UA, 6.63%,^(h)(j)			200		263,885
Credit Agricole SA,^(b)(h)(j):
6.63%			1,400		1,406,883
7.88%			1,000		1,040,000
Intesa Sanpaolo SpA, 7.00%,^(h)(j)			200		242,578
Nordea Bank AB, 6.13%,^(b)(h)(j)			2,960		2,934,100
Wells Fargo & Co.,^(h)(j):
Series S, 5.90%			3,450		3,458,970
Series U, 5.88%			525		539,054

					24,677,726
Capital Markets — 0.7%
Goldman Sachs Group, Inc., Series P, 5.00%,^(c)(j)			685		651,435
Morgan Stanley, Series H, 5.45%,^(h)(j)			2,627		2,676,256


Security	Par (000)			Value
Capital Markets (continued)
State Street Corp., Series F, 5.25%^(h)(j)		USD	2,000	$	2,042,500

					5,370,191
Chemicals — 0.0%
Solvay Finance SA, 5.12%,^(h)(j)			100		128,011

Diversified Financial Services — 4.7%
ATF Netherlands BV, 3.75%,^(h)(j)			100		118,366
Bank of America Corp.^(h)(j):
Series AA, 6.10%			300		309,375
Series FF, 5.88%^(c)			3,500		3,460,625
Series V, 5.13%			175		176,750
Series X, 6.25%			4,620		4,805,816
Bank of New York Mellon Corp.^(h)(j):
Series D, 4.50%,^(f)			2,000		1,900,000
Series E, 4.95%			2,000		2,039,000
Barclays PLC, 7.25%,^(h)(j)			200		278,265
Credit Suisse Group AG, 6.25%,^(h)(j)			200		198,500
HBOS Capital Funding LP, 6.85%,^(j)			100		100,960
HSBC Holdings PLC,^(j):
6.00%^(h)			435		416,513
6.50%,^(c)			1,090		1,080,463
JPMorgan Chase & Co.^(h)(j)
Series 1, 5.83%			7,000		7,043,750
Series Q, 5.15%,			3,000		2,962,500
Series U, 6.13%			500		516,250
Series V, 5.00%			6,430		6,486,262
Royal Bank of Scotland Group PLC, 8.63%,^(h)(j)			200		216,440
Societe Generale SA^(b)(h)(j):
6.00%			3,000		2,950,950
7.88%^(f)			1,000		1,040,000

					36,100,785
Diversified Telecommunication Services — 0.0%
Telefonica Europe BV, 4.20%,^(h)(j)			200		243,563

Electric Utilities — 0.6%
ComEd Financing III, 6.35% , 03/15/2033			300		319,500
Electricite de France SA, 5.25%,^(b)(h)(j)			4,200		4,107,600
Gas Natural Fenosa Finance BV, 4.13%^(h)(j)			100		122,326


26

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)				Value
Electric Utilities (continued)
RWE AG, 2.75% , 04/21/2075^(h)		USD		10	$	11,886

						4,561,312
Insurance — 1.8%
Allstate Corp.^(h) 5.75% , 08/15/2053				2,000		2,067,500
6.50% , 05/15/2067				4,100		4,610,204
MetLife, Inc., 6.40% , 12/15/2066				2,554		2,750,658
Voya Financial, Inc., 5.65% , 05/15/2053^(h)				4,500		4,545,000

						13,973,362

Total Capital Trusts — 11.2% (Cost — $84,923,055)						85,312,020


			Shares
Preferred Stocks — 0.9%

Banks — 0.3%
Wells Fargo & Co., Series Q, 5.85%^(h)(j)				75,000		1,937,250

Capital Markets — 0.6%
Goldman Sachs Group, Inc., Series J, 5.50%^(h)(j)				92,000		2,390,160
Morgan Stanley, Series K, 5.85%^(h)(j)				66,567		1,716,763
SCE Trust III, Series H, 5.75%^(h)(j)				25,314		665,505

						4,772,428
Machinery — 0.0%
Stanley Black & Decker, Inc., 5.38%^(h)(j)				2,500		266,125

Thrifts & Mortgage Finance — 0.0%
Federal Home Loan Mortgage Corp., Series S, 8.25%^(c)(j)				10,000		63,100

Total Preferred Stocks — 0.9% (Cost — $6,864,478)						7,038,903


Trust Preferred

Diversified Financial Services — 0.1%
Citigroup Capital XIII, 6.37%, 10/30/40^(h)				29,583		794,599

Total Trust Preferreds — 0.1% (Cost — $779,529)						794,599

Total Preferred Securities — 12.2%						93,145,522


Security	Par (000)				Value
U.S. Government Sponsored Agency Securities — 14.5%

Agency Obligations — 1.5%
Fannie Mae, 5.63%, 07/15/37^(f)		USD	1,600		$	2,143,261
Federal Home Loan Bank^(f):
5.25%, 12/09/22			1,375			1,526,530
5.37%, 09/09/24			2,175			2,481,421
Residual Funding Corp., 0.00%, 04/15/30^(k)			6,055			4,079,318
Resolution Funding Corp., 0.00%, 07/15/18 - 10/15/18^(k)			1,050			1,044,423

						11,274,953
Collateralized Mortgage Obligations — 4.2%
Fannie Mae Mortgage-Backed Securities:
Series 2015-47, Class GL, 3.50%, 07/25/45			1,636			1,599,686
Series 2005-5, Class PK, 5.00%, 12/25/34			70			70,289
Series 1991-87, Class S, (1 mo. LIBOR + 26.68%), 21.49%, 08/25/21^(a)			2			2,056
Series G-49, Class S, (1 mo. LIBOR + 1034.80%), 830.99%, 12/25/21^(a)			—	^(m)		3
Series G-17, Class S, 879.55%, 06/25/21^(c)			—	^(m)		—
Series G-07, Class S, (1 mo. LIBOR + 1151.69%), 923.53%, 03/25/21^(a)			—	^(m)		42
Series G-33, Class PV, 1078.42%, 10/25/21			—	^(m)		—
Series 1991-46, Class S, (1 mo. LIBOR + 2519.00%), 2070.23%, 05/25/21^(a)			—	^(m)		—
Freddie Mac Mortgage-Backed Securities:
Series 0173, Class RS, 11.10%, 11/15/21^(c)(e)			—	^(m)		1
Series 4350, Class DY, 4.00%, 06/15/44			2,830			2,924,508
Series 4480, Class ZX, 4.00%, 11/15/44			6,179			6,214,635
Series 4549, Class TZ, 4.00%, 11/15/45			2,707			2,812,180
Series 4398, Class ZX, 4.00%, 09/15/54			8,885			9,099,195
Series 0173, Class R, 9.00%, 11/15/21^(e)			—	^(m)		—
Series 1057, Class J, 1008.00%, 03/15/21			—	^(m)		—
Series 0192, Class U, 1009.03%, 02/15/22^(c)			—	^(m)		—


			27

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)				Value
Collateralized Mortgage Obligations (continued)
Ginnie Mae Mortgage-Backed Securities, Series 2014-72, Class MQ, 4.00%, 02/20/44		USD	8,858		$	9,033,065

						31,755,660
Commercial Mortgage-Backed Securities — 0.2%
Freddie Mac, Series K013, Class A2, 3.97%, 01/25/21^(c)			1,870			1,918,264

Interest Only Collateralized Mortgage Obligations — 0.5%
Fannie Mae Mortgage-Backed Securities:
Series 1997-50, Class SI, (1 mo. LIBOR + 9.20%), 1.20%, 04/25/23^(a)			28			597
Series 2012-96, Class DI, 4.00%, 02/25/27			4,213			318,254
Series 2012-47, Class NI, 4.50%, 04/25/42			4,343			991,869
Series G92-05, Class H, 9.00%, 01/25/22			—	^(m)		6
Series 094, Class 2, 9.50%, 08/25/21			—	^(m)		14
Series 1990-136, Class S, 18.12%, 11/25/20^(a)			—	^(m)		—
Series 1991-139, Class PT, 648.35%, 10/25/21			—	^(m)		—
Series G-10, Class S, 893.49%, 05/25/21^(a)			—	^(m)		—
Series 1991-099, Class L, 930.00%, 08/25/21			—	^(m)		—
Series G-12, Class S, (1 mo. LIBOR + 1175.53%), 947.45%, 05/25/21^(a)			—	^(m)		—
Series 1990-123, Class M, 1009.50%, 10/25/20			—	^(m)		—
Freddie Mac Mortgage-Backed Securities:
Series K707, Class X1, 1.51%, 12/25/18^(c)			4,590			18,152
Series 2611, Class QI, 5.50%, 09/15/32			165			2,944
Series 1254, Class Z, 8.50%, 04/15/22			13			1,544
Series 1043, Class H, (1 mo. LIBOR + 45.00%), 36.37%, 02/15/21^(a)			1			1
Series 1054, Class I, (1 mo. LIBOR + 5.26%), 714.40%, 03/15/21^(a)			—	^(m)		—
Series 1148, Class E, (1 mo. LIBOR + 1196.85%), 970.61%, 10/15/21^(a)			—	^(m)		—


Security	Par (000)				Value
Interest Only Collateralized Mortgage Obligations (continued)
Freddie Mac Mortgage-Backed Securities (continued):
Series 0176, Class M, 1010.00%, 07/15/21		USD	—	^(m)	$	—
Series 1056, Class KD, 1084.50%, 03/15/21			—	^(m)		—
Series 0019, Class R, 6696.22%, 03/15/20^(c)(e)			—	^(m)		—
Ginnie Mae Mortgage-Backed Securities^(a):
Series 2009-78, Class SD, (1 mo. LIBOR + 6.20%), 4.25%, 09/20/32			4,735			453,036
Series 2009-116, Class KS, (1 mo. LIBOR + 6.47%), 4.54%, 12/16/39			1,664			203,386
Series 2011-52, Class NS, (1 mo. LIBOR + 6.67%), 4.74%, 04/16/41			13,569			2,161,734

						4,151,537
Mortgage-Backed Securities — 8.1%
Fannie Mae Mortgage-Backed Securities^(f):
3.00%, 08/01/43			9,348			9,150,320
4.00%, 12/01/41 - 04/01/56			30,329			31,244,657
4.50%, 07/01/41 - 07/01/55			16,755			17,681,552
5.00%, 08/01/34			1,665			1,785,435
5.50%, 06/01/38			815			884,257
6.00%, 12/01/38			669			740,827
Freddie Mac Mortgage-Backed Securities, 6.00%, 09/01/18 - 12/01/18			3			3,696
Ginnie Mae Mortgage-Backed Securities:
5.50%, 08/15/33			45			48,405
8.00%, 07/15/24			—			85

						61,539,234
Principal Only Collateralized Mortgage Obligations — 0.0%
Fannie Mae Mortgage-Backed Securities^(k):
Series 1993-51, Class E, 0.00%, 02/25/23			5			4,967
Series 203, Class 1, 0.00%, 02/25/23			2			1,503
Series 1993-70, Class A, 0.00%, 05/25/23			1			844


28

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

(Percentages shown are based on Net Assets)


Security	Par (000)			Value
Principal Only Collateralized Mortgage Obligations (continued)
Fannie Mae Mortgage-Backed Securities^(k)(continued):
Series 0228, Class 1, 0.00%, 06/25/23		USD	1	$	1,237

					8,551

Total U.S. Government Sponsored Agency Securities — 14.5% (Cost — $111,099,231)					110,648,199

U.S. Treasury Obligations — 16.3%
U.S. Treasury Bonds^(f):
3.00%, 11/15/44			61,400		61,656,633
2.50%, 02/15/46			66,500		60,442,266
U.S. Treasury Notes, 2.75%, 11/15/47			2,000		1,907,265

Total U.S. Treasury Obligations — 16.3% (Cost — $131,995,669)					124,006,164

Total Long-Term Investments — 140.5% (Cost — $1,064,475,496)					1,071,474,811


Security	Shares		Value
Short-Term Securities — 2.7%
BlackRock Liquidity Funds, T-Fund, Institutional Class, 1.61%^(o)(p)		20,931,481	$	20,931,481

Total Short-Term Securities — 2.7% (Cost — $20,931,481)				20,931,481

Options Purchased — 0.4% (Cost — $3,705,818)				2,876,240

Total Investments Before Options Written — 143.6% (Cost — $1,089,112,796)				1,095,282,533

Options Written — (0.5)% (Premiums Received — $3,752,326)				(4,191,901	)

Total Investments, Net of Options Written — 143.1% (Cost — $1,085,360,470)				1,091,090,632
Liabilities in Excess of Other Assets — (43.1)%				(328,358,513	)

Net Assets Applicable to Common Shares — 100.0%			$	762,732,119

^(a)	Variable rate security. Rate shown is the rate in effect as of period end.

^(b)	Security exempt from registration pursuant to Rule 144A under the Securities Act of 1933, as amended. These securities may be resold in transactions exempt from registration to qualified institutional investors.

^(c)	Variable or floating rate security, which interest rate adjusts periodically based on changes in current interest rates and prepayments on the underlying pool of assets. Rate shown is the rate in effect as of period end.

^(d)	When-issued security.

^(e)	Security is valued using significant unobservable inputs and is classified as Level 3 in the fair value hierarchy.

^(f)	All or a portion of the security has been pledged as collateral in connection with outstanding reverse repurchase agreements.

^(g)	Payment-in-kind security which may pay interest/dividends in additional par/shares and/or in cash. Rates shown are the current rate and possible payment rates.

^(h)	Variable rate security. Security may be issued at a fixed coupon rate, which converts to a variable rate at a specified date. Rate shown is the rate in effect as of period end.

⁽ⁱ⁾	Convertible security.

^(j)	Perpetual security with no stated maturity date.

^(k)	Zero-coupon bond.

^(l)	Step-up bond that pays an initial coupon rate for the first period and then a higher coupon rate for the following periods. Rate as of period end.

^(m)	Amount is less than $500.

⁽ⁿ⁾	Represents an unsettled loan commitment at period end. Certain details associated with this purchase are not known prior to the settlement date, including coupon rate.

^(o)	Annualized 7-day yield as of period end.


			29

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

^(p)	During the year ended May 31, 2018, investments in issuers considered to be affiliates of the Trust for purposes of Section 2(a)(3) of the Investment Company Act of 1940, as amended, and/or related parties of the Trust were as follows:


Affiliated	Shares Held at 08/31/17	Net Activity	Shares Held at 05/31/18		Value at 05/31/18		Income		Net Realized Gain (Loss)	^(a)		Change in Unrealized Appreciation (Depreciation)
BlackRock Liquidity Funds, T-Fund, Institutional Class	4,374,729	16,556,752	20,931,481	$	20,931,481	$	79,135	$	36		$	—

^(a)

Includes net capital gain distributions, if applicable.

For Trust’s compliance purposes, the Trust’s industry classifications refer to one or more of the industry sub-classifications used by one or more widely recognized market indexes or rating group indexes, and/or as defined by the investment adviser. These definitions may not apply for purposes of this report, which may combine such industry sub-classifications for reporting ease.

Portfolio Abbreviations

CLO — Collateralized Loan Obligation

EUR — Euro

FNMA — Federal National Mortgage Association

GBP — British Pound

GO — General Obligation Bonds

LIBOR — London Interbank Offered Rate

NZD — New Zealand Dollar

OTC — Over-the-Counter

PIK — Payment-In-Kind

RB — Revenue Bonds

USD — U.S. Dollar

Reverse Repurchase Agreements

Counterparty

Interest
Rate

Trade
Date

Maturity
Date

^(a)

Face Value

Face Value
Including
Accrued Interest

Type of Non-Cash

Underlying Collateral

Remaining Contractual Maturity of the Agreements^(a)

Nomura Securities International, Inc.

1.85

06/20/17

Open

28,687,500

29,071,673

U.S. Treasury Obligations

Open/Demand

RBC Capital Markets LLC

2.09

08/30/17

Open

3,509,000

3,556,777

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

08/30/17

Open

1,901,250

1,927,137

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

08/30/17

Open

2,154,375

2,183,708

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

08/30/17

Open

2,227,500

2,257,829

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

09/29/17

Open

1,644,750

1,665,038

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

09/29/17

Open

1,850,000

1,872,819

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

09/29/17

Open

3,885,700

3,933,629

Corporate Bonds

Open/Demand

BNP Paribas Securities Corp.

1.57

12/14/17

Open

856,832

862,948

Corporate Bonds

Open/Demand


30

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

Reverse Repurchase Agreements (continued)

Counterparty

Interest
Rate

Trade
Date

Maturity
Date

^(a)

Face Value

Face Value
Including
Accrued Interest

Type of Non-Cash

Underlying Collateral

Remaining Contractual Maturity of the Agreements^(a)

BNP Paribas Securities Corp.

1.85

12/14/17

Open

1,311,750

1,321,898

U.S. Government Sponsored Agency Securities

Open/Demand

BNP Paribas Securities Corp.

1.85

12/14/17

Open

797,125

803,292

U.S. Government Sponsored Agency Securities

Open/Demand

BNP Paribas Securities Corp.

1.85

12/14/17

Open

1,409,169

1,420,070

U.S. Government Sponsored Agency Securities

Open/Demand

J.P. Morgan Securities LLC

(0.05

)

01/08/18

Open

157,620

157,502

Corporate Bonds

Open/Demand

J.P. Morgan Securities LLC

1.25

01/09/18

Open

165,241

165,966

Corporate Bonds

Open/Demand

Merrill Lynch, Pierce, Fenner & Smith, Inc.

1.86

01/22/18

Open

761,063

765,572

U.S. Government Sponsored Agency Securities

Open/Demand

Merrill Lynch, Pierce, Fenner & Smith, Inc.

1.86

01/22/18

Open

1,263,125

1,270,609

U.S. Government Sponsored Agency Securities

Open/Demand

Deutsche Bank AG

(0.50

)

01/25/18

Open

71,000

70,845

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

01/30/18

Open

2,590,750

2,607,924

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

01/30/18

Open

8,151,615

8,205,651

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

01/30/18

Open

8,404,995

8,460,711

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

01/30/18

Open

7,171,075

7,218,611

Corporate Bonds

Open/Demand

Barclays Capital, Inc.

(1.50

)

02/02/18

Open

129,430

129,123

Corporate Bonds

Open/Demand

J.P. Morgan Securities LLC

(0.50

)

02/13/18

Open

897,500

895,898

Capital Trusts

Open/Demand

BNP Paribas Securities Corp.

1.90

03/09/18

Open

3,640,000

3,655,131

Corporate Bonds

Open/Demand

HSBC Securities (USA), Inc.

2.00

03/09/18

Open

1,710,000

1,717,493

Corporate Bonds

Open/Demand

BNP Paribas Securities Corp.

2.25

03/15/18

Open

1,945,000

1,954,293

Corporate Bonds

Open/Demand

Citigroup Global Market, Inc.

(1.25

)

03/23/18

Open

97,282

97,056

Corporate Bonds

Open/Demand

BNP Paribas Securities Corp.

2.11

04/11/18

Open

744,200

746,381

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/11/18

Open

3,159,000

3,168,170

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/11/18

Open

3,510,375

3,520,565

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/11/18

Open

3,160,300

3,169,474

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/11/18

Open

4,382,625

4,395,347

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/11/18

Open

2,438,000

2,445,077

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/11/18

Open

3,155,625

3,164,785

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/11/18

Open

3,670,000

3,680,653

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/11/18

Open

2,502,000

2,509,263

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/11/18

Open

6,838,600

6,858,451

Corporate Bonds

Open/Demand

Barclays Capital, Inc.

2.25

04/12/18

Open

1,162,480

1,166,040

Corporate Bonds

Open/Demand

Barclays Capital, Inc.

2.25

04/12/18

Open

1,114,781

1,118,195

Corporate Bonds

Open/Demand


			31

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

Reverse Repurchase Agreements (continued)

Counterparty

Interest
Rate

Trade
Date

Maturity
Date

^(a)

Face Value

Face Value
Including
Accrued Interest

Type of Non-Cash

Underlying Collateral

Remaining Contractual Maturity of the Agreements^(a)

Barclays Capital, Inc.

2.25

04/12/18

Open

1,259,349

1,263,206

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/12/18

Open

2,044,876

2,050,420

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/12/18

Open

2,918,750

2,927,053

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/12/18

Open

1,543,500

1,547,891

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/12/18

Open

2,425,000

2,431,898

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/12/18

Open

4,725,000

4,738,441

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/12/18

Open

2,239,650

2,246,021

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/12/18

Open

1,827,420

1,832,619

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/12/18

Open

1,634,500

1,639,150

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/12/18

Open

1,905,000

1,910,419

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/12/18

Open

1,768,500

1,773,531

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/12/18

Open

2,366,595

2,373,327

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/12/18

Open

1,920,488

1,925,951

Corporate Bonds

Open/Demand

RBC Capital Markets LLC

2.09

04/12/18

Open

1,777,500

1,782,556

Corporate Bonds

Open/Demand

BNP Paribas Securities Corp.

1.74

05/08/18

Open

61,016,250

61,087,029

U.S. Treasury Obligations

Open/Demand

Deutsche Bank AG

1.79

05/08/18

Open

22,250,000

22,280,298

U.S. Treasury Obligations

Open/Demand

HSBC Securities (USA), Inc.

1.89

05/10/18

6/13/18

911,000

911,861

U.S. Government Sponsored Agency Securities

Up to 30 Days

HSBC Securities (USA), Inc.

1.89

05/10/18

6/13/18

2,644,000

2,646,499

U.S. Government Sponsored Agency Securities

Up to 30 Days

HSBC Securities (USA), Inc.

1.89

05/10/18

6/13/18

8,263,000

8,270,809

U.S. Government Sponsored Agency Securities

Up to 30 Days

HSBC Securities (USA), Inc.

1.89

05/10/18

6/13/18

7,578,000

7,585,161

U.S. Government Sponsored Agency Securities

Up to 30 Days

HSBC Securities (USA), Inc.

1.89

05/10/18

6/13/18

2,560,000

2,562,419

U.S. Government Sponsored Agency Securities

Up to 30 Days

HSBC Securities (USA), Inc.

1.89

05/10/18

6/13/18

7,290,000

7,296,889

U.S. Government Sponsored Agency Securities

Up to 30 Days

HSBC Securities (USA), Inc.

1.89

05/10/18

6/13/18

1,797,000

1,798,698

U.S. Government Sponsored Agency Securities

Up to 30 Days

HSBC Securities (USA), Inc.

1.89

05/10/18

6/13/18

751,000

751,710

U.S. Government Sponsored Agency Securities

Up to 30 Days

HSBC Securities (USA), Inc.

1.89

05/10/18

6/13/18

18,215,000

18,232,213

U.S. Government Sponsored Agency Securities

Up to 30 Days


32

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

Reverse Repurchase Agreements (continued)

Counterparty

Interest
Rate

Trade
Date

Maturity
Date

^(a)

Face Value

Face Value
Including
Accrued Interest

Type of Non-Cash

Underlying Collateral

Remaining Contractual Maturity of the Agreements^(a)

HSBC Securities (USA), Inc.

1.89

05/10/18

6/13/18

1,927,000

1,928,821

U.S. Government Sponsored Agency Securities

Up to 30 Days

HSBC Securities (USA), Inc.

1.89

05/10/18

6/13/18

4,767,000

4,771,505

U.S. Government Sponsored Agency Securities

Up to 30 Days

HSBC Securities (USA), Inc.

1.89

05/10/18

6/13/18

2,256,000

2,258,132

U.S. Government Sponsored Agency Securities

Up to 30 Days

HSBC Securities (USA), Inc.

2.00

05/14/18

Open

1,835,000

1,836,733

Capital Trusts

Open/Demand

Barclays Capital, Inc.

(1.50

)

05/15/18

Open

207,570

207,432

Capital Trusts

Open/Demand

Barclays Capital, Inc.

(1.00

)

05/18/18

Open

93,188

93,151

Corporate Bonds

Open/Demand

Deutsche Bank AG

(3.00

)

05/18/18

Open

544,573

543,938

Corporate Bonds

Open/Demand

Barclays Capital, Inc.

(1.00

)

05/22/18

Open

56,780

56,766

Corporate Bonds

Open/Demand

Barclays Capital, Inc.

(2.25

)

05/23/18

Open

1,002,488

1,002,989

Corporate Bonds

Open/Demand

Barclays Capital, Inc.

2.25

05/23/18

Open

1,113,813

1,114,369

Corporate Bonds

Open/Demand

Barclays Capital, Inc.

2.25

05/23/18

Open

935,782

936,254

Corporate Bonds

Open/Demand

Barclays Capital, Inc.

2.25

05/23/18

Open

977,765

978,254

Corporate Bonds

Open/Demand

BNP Paribas Securities Corp.

2.17

05/23/18

Open

3,909,600

3,911,485

Corporate Bonds

Open/Demand

HSBC Securities (USA), Inc.

2.00

05/23/18

Open

3,248,000

3,249,444

Corporate Bonds

Open/Demand

HSBC Securities (USA), Inc.

2.00

05/23/18

Open

3,622,000

3,623,610

Corporate Bonds

Open/Demand

HSBC Securities (USA), Inc.

2.25

05/23/18

Open

3,915,000

3,916,958

Corporate Bonds

Open/Demand

Barclays Capital, Inc.

0.75

05/24/18

Open

140,910

140,931

Corporate Bonds

Open/Demand

Citigroup Global Market, Inc.

0.25

05/24/18

Open

150,804

150,811

Corporate Bonds

Open/Demand

Credit Suisse Securities (USA) LLC

2.00

05/24/18

Open

547,950

548,163

Corporate Bonds

Open/Demand

Credit Suisse Securities (USA) LLC

2.00

05/24/18

Open

2,211,000

2,211,860

Corporate Bonds

Open/Demand

Credit Suisse Securities (USA) LLC

2.00

05/24/18

Open

1,148,875

1,149,322

Corporate Bonds

Open/Demand

Credit Suisse Securities (USA) LLC

2.00

05/24/18

Open

2,323,825

2,324,729

Corporate Bonds

Open/Demand

Credit Suisse Securities (USA) LLC

2.00

05/24/18

Open

1,446,250

1,446,812

Corporate Bonds

Open/Demand

UBS Securities LLC

2.05

05/29/18

Open

3,732,750

3,733,175

Foreign Agency Obligations

Open/Demand

UBS Securities LLC

2.10

05/29/18

Open

3,781,425

3,781,866

Foreign Agency Obligations

Open/Demand

UBS Securities LLC

2.25

05/29/18

Open

2,591,698

2,592,021

Corporate Bonds

Open/Demand

UBS Securities LLC

2.25

05/29/18

Open

335,775

335,817

Corporate Bonds

Open/Demand

Nomura Securities International, Inc.

2.20

05/30/18

Open

3,713,461

3,713,688

Foreign Agency Obligations

Open/Demand


			33

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

Reverse Repurchase Agreements (continued)


Counterparty	Interest Rate		Trade Date	Maturity Date	^(a)		Face Value		Face Value Including Accrued Interest	Type of Non-Cash Underlying Collateral	Remaining Contractual Maturity of the Agreements^(a)
RBC Capital Markets LLC	2.09	%	05/30/18	Open		$	3,066,000	$	3,066,178	Corporate Bonds	Open/Demand

						$	342,462,293	$	343,682,887

^(a)

Certain agreements have no stated maturity and can be terminated by either party at any time.

Derivative Financial Instruments Outstanding as of Period End

Futures Contracts


Description	Number of Contracts		Expiration Date		Notional Amount (000)		Value / Unrealized Appreciation (Depreciation)
Long Contracts:
Euro Stoxx 600 Index		1		06/15/18	$	9	$	(791	)
Ultra Long U.S. Treasury Bond		34		09/19/18		5,423		170,514
90-Day Euro Future		98		03/18/19		23,852		(31,040	)

								138,683

Short Contracts:
Euro Bund		1		06/07/18		155		(1,824	)
10-Year U.S. Treasury Note		333		09/19/18		40,106		(271,935	)
10-Year U.S. Ultra Long Treasury Note		135		09/19/18		17,326		5,023
11-Long U.S. Treasury Bond		26		09/19/18		3,773		(82,066	)
Long Gilt Future		1		09/26/18		164		(2,115	)
2-Year U.S. Treasury Note		415		09/28/18		88,077		(227,022	)
5-Year U.S. Treasury Note		42		09/28/18		4,783		12,452
90-Day Euro Future		98		03/16/20		23,799		(3,911	)

								(571,398	)

							$	(432,715	)

Forward Foreign Currency Exchange Contracts


Currency Purchased		Currency Sold		Counterparty	Settlement Date		Unrealized Appreciation (Depreciation)
EUR	1,897,000	USD	2,214,748	Morgan Stanley & Co. International PLC		06/04/18	$	2,941
EUR	8,313,000	USD	9,705,428	Morgan Stanley & Co. International PLC		06/04/18		12,890
USD	11,894	EUR	10,000	Standard Chartered Bank		06/04/18		204
USD	112,513	EUR	94,000	State Street Bank and Trust Co.		06/04/18		2,622
USD	116,656	EUR	97,000	State Street Bank and Trust Co.		06/04/18		3,258
USD	201,193	EUR	168,000	State Street Bank and Trust Co.		06/04/18		4,792
USD	2,333,092	EUR	1,927,000	UBS AG		06/04/18		80,332
USD	9,773,077	EUR	8,072,000	UBS AG		06/04/18		336,501
USD	11,343,757	GBP	8,233,000	Australia and New Zealand Bank Group		06/04/18		399,213
USD	1,923,127	GBP	1,397,000	BNP Paribas S.A.		06/04/18		66,024


34

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

Forward Foreign Currency Exchange Contracts (continued)


Currency Purchased		Currency Sold		Counterparty	Settlement Date		Unrealized Appreciation (Depreciation)
USD	119,928	GBP	89,000	Royal Bank of Scotland PLC		06/04/18	$	1,616
USD	139,474	NZD	198,000	Australia and New Zealand Bank Group		06/05/18		914
USD	1,760,644	GBP	1,321,393	BNP Paribas S.A.		07/05/18		1,221
USD	10,969,773	GBP	8,233,000	BNP Paribas S.A.		07/05/18		7,611
USD	138,897	NZD	198,000	Australia and New Zealand Bank Group		07/05/18		334

								920,473

GBP	1,321,393	USD	1,757,849	BNP Paribas S.A.		06/04/18		(1,255	)
GBP	8,233,000	USD	10,952,360	BNP Paribas S.A.		06/04/18		(7,816	)
NZD	198,000	USD	138,897	Australia and New Zealand Bank Group		06/05/18		(337	)
USD	2,220,097	EUR	1,897,000	Morgan Stanley & Co. International PLC		07/05/18		(3,017	)
USD	9,728,870	EUR	8,313,000	Morgan Stanley & Co. International PLC		07/05/18		(13,222	)

								(25,647	)

							$	894,826

Interest Rate Caps Purchased


Description	Exercise Rate			Counterparty		Expiration Date		Notional Amount (000)			Value		Premiums Paid		Unrealized Depreciation
2Y – 10Y CMS Index Cap		0.24	%		Barclays Bank PLC		01/24/19		USD	18,000	$	10,465	$	25,560	$	(15,095	)
2Y – 10Y CMS Index Cap		0.33			Barclays Bank PLC		01/30/19		USD	19,180		6,926		21,098		(14,172	)

											$	17,391	$	46,658	$	(29,267	)

Exchange-Traded Options Purchased


Description	Number of Contracts		Expiration Date		Exercise Price			Notional Amount (000)			Value
Call
10-Year U.S. Treasury Note		47		06/22/18		USD	120.75		USD	5,675	$	17,625
90-Day Euro Future		13		03/18/19		USD	97.38		USD	3,165		4,713

												22,338


			35

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

OTC Interest Rate Swaptions Purchased

Description

Paid by the Trust

Received by the Trust

Counterparty

Expiration
Date

Exercise
Rate

Notional
Amount (000)

Value

Rate

Frequency

Rate

Frequency

Call

2-Year Interest Rate Swap, 10/19/20

3-Month LIBOR,

2.32

Quarterly

1.25

Semi-annual

Deutsche Bank AG

10/17/18

1.25

USD

10,000

10-Year Interest Rate Swap, 03/15/29

3-Month LIBOR,
2.32

Quarterly

2.75

Semi-annual

Barclays Bank PLC

03/13/19

2.75

USD

2,290

32,267

15-Year Interest Rate Swap, 06/10/35

6-Month JPY
LIBOR, 0.02

Semi-annual

0.65

Semi-annual

Barclays Bank PLC

06/08/20

0.65

JPY

125,000

18,406

15-Year Interest Rate Swap, 09/16/35

6-Month JPY
LIBOR, 0.02

Semi-annual

0.66

Semi-annual

Morgan Stanley & Co.

International PLC

09/14/20

0.66

JPY

50,000

7,625

15-Year Interest Rate Swap, 09/16/35

6-Month JPY
LIBOR, 0.02

Semi-annual

0.66

Semi-annual

Barclays Bank PLC

09/14/20

0.66

JPY

50,000

7,625

20-Year Interest Rate Swap, 04/18/41

6-Month JPY
LIBOR, 0.02

Semi-annual

0.78

Semi-annual

JPMorgan Chase Bank N.A.

04/16/21

0.78

JPY

105,700

22,621

30-Year Interest Rate Swap, 04/28/53

3-Month LIBOR,
2.32

Quarterly

3.11

Semi-annual

Goldman Sachs Bank USA

04/26/23

3.11

USD

520

66,500

10-Year Interest Rate Swap, 01/27/37^(a)

3-Month LIBOR,
2.32

Quarterly

2.60

Semi-annual

Deutsche Bank AG

01/25/27

2.60

USD

1,900

(50,515

)

10-Year Interest Rate Swap, 02/10/37

3-Month LIBOR,
2.32

Quarterly

2.40

Semi-annual

Deutsche Bank AG

02/08/27

2.40

USD

1,875

70,059

10-Year Interest Rate Swap, 04/29/48

3-Month LIBOR,
2.32

Quarterly

2.99

Semi-annual

JPMorgan Chase Bank N.A.

04/27/38

2.99

USD

910

50,301

224,955

Put

5-Year Interest Rate Swap, 02/15/24

3.25

Semi-annual

3-Month LIBOR,
2.32

Quarterly

Deutsche Bank AG

02/13/19

3.25

USD

25,700

106,889

30-Year Interest Rate Swap, 02/05/50

4.00

Semi-annual

3-Month LIBOR,
2.32

Quarterly

Goldman Sachs Bank USA

02/03/20

4.00

USD

1,600

18,049

15-Year Interest Rate Swap, 05/17/35

1.10

Semi-annual

6-Month JPY
LIBOR, 0.02

Semi-annual

Barclays Bank PLC

05/15/20

1.10

JPY

250,000

13,431

15-Year Interest Rate Swap, 06/10/35

0.65

Semi-annual

6-Month JPY
LIBOR, 0.02

Semi-annual

Barclays Bank PLC

06/08/20

0.65

JPY

125,000

22,238

15-Year Interest Rate Swap, 09/16/35

0.66

Semi-annual

6-Month JPY
LIBOR, 0.02

Semi-annual

Barclays Bank PLC

09/14/20

0.66

JPY

50,000

9,881

15-Year Interest Rate Swap, 09/16/35

0.66

Semi-annual

6-Month JPY
LIBOR, 0.02

Semi-annual

Morgan Stanley & Co. International PLC

09/14/20

0.66

JPY

50,000

9,881

10-Year Interest Rate Swap, 02/03/21

3.50

Semi-annual

3-Month LIBOR,
2.32

Quarterly

Bank of America N.A.

02/01/21

3.50

USD

4,000

84,024

10-Year Interest Rate Swap, 02/03/21

3.50

Semi-annual

3-Month LIBOR,
2.32

Quarterly

Citibank N.A.

02/01/21

3.50

USD

4,380

92,007

20-Year Interest Rate Swap, 04/18/41

0.78

Semi-annual

6-Month JPY
LIBOR, 0.02

Semi-annual

JPMorgan Chase Bank N.A.

04/16/21

0.78

JPY

105,700

38,398

10-Year Interest Rate Swap, 01/13/32

1.25

Semi-annual

6-Month JPY
LIBOR, 0.02

Semi-annual

Credit Suisse International

01/11/22

1.25

JPY

250,000

14,207

10-Year Interest Rate Swap, 02/24/32

1.55

Semi-annual

6-Month JPY
LIBOR, 0.02

Semi-annual

Credit Suisse International

02/22/22

1.55

JPY

250,000

10,886

10-Year Interest Rate Swap, 03/18/32

1.60

Semi-annual

6-Month JPY
LIBOR, 0.02

Semi-annual

JPMorgan Chase Bank N.A.

03/16/22

1.60

JPY

250,000

10,692


36

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

OTC Interest Rate Swaptions Purchased (continued)

Description

Paid by the Trust

Received by the Trust

Counterparty

Expiration
Date

Exercise
Rate

Notional
Amount (000)

Value

Rate

Frequency

Rate

Frequency

Put

10-Year Interest Rate Swap, 04/06/32

1.45

Semi-annual

6-Month JPY LIBOR,
0.02

Semi-annual

JPMorgan Chase Bank N.A.

04/04/22

1.45

JPY

250,000

12,730

15-Year Interest Rate Swap, 05/05/37

3.25

Semi-annual

3-Month LIBOR,
2.32

Quarterly

Goldman Sachs Bank USA

05/03/22

3.25

USD

4,050

193,016

10-Year Interest Rate Swap, 08/18/32

3.00

Semi-annual

3-Month LIBOR,
2.32

Quarterly

JPMorgan Chase Bank N.A.

08/16/22

3.00

USD

22,000

1,004,844

30-Year Interest Rate Swap, 02/15/53

3.35

Semi-annual

3-Month LIBOR,
2.32

Quarterly

Barclays Bank PLC

02/13/23

3.35

USD

9,557

663,184

30-Year Interest Rate Swap, 04/28/53

3.11

Semi-annual

3-Month LIBOR,
2.32

Quarterly

Goldman Sachs Bank USA

04/26/23

3.11

USD

520

45,823

10-Year Interest Rate Swap, 04/14/37

3.00

Semi-annual

3-Month LIBOR,
2.32

Quarterly

JPMorgan Chase Bank N.A.

04/12/27

3.00

USD

2,590

147,400

20-Year Interest Rate Swap, 08/11/53

4.00

Annual

6-Month EURIBOR,

(0.27

)

Semi-annual

Barclays Bank PLC

08/09/33

4.00

EUR

2,410

72,275

10-Year Interest Rate Swap, 04/29/48

2.99

Semi-annual

3-Month LIBOR,
2.32

Quarterly

JPMorgan Chase Bank N.A.

04/27/38

2.99

USD

910

41,701

2,611,556

2,836,511

^(a)

Forward settling swaption.

Exchange-Traded Options Written

Description

Number of
Contracts

Expiration
Date

Exercise
Price

Notional

Amount (000)

Value

Call

90-Day Euro Future

01/26/18

USD

97.25

USD

(2,188)

(4,613)

OTC Interest Rate Swaptions Written

Description

Paid by the Trust

Received by the Trust

Counterparty

Expiration
Date

Exercise
Rate

Notional
Amount (000)

Value

Rate

Frequency

Rate

Frequency

Call

10-Year Interest Rate Swap, 07/15/28

2.45

Semi-annual

3-Month LIBOR,
2.32

Quarterly

Deutsche Bank AG

07/13/18

2.45

USD

2,000

(642

)

2-Year Interest Rate Swap, 10/19/20

0.90

Semi-annual

3-Month LIBOR,
2.32

Quarterly

Deutsche Bank AG

10/17/18

0.90

USD

10,000

(21

)

10-Year Interest Rate Swap, 01/05/29

0.65

Annual

6-Month EURIBOR,

(0.27

)

Semi-annual

Morgan Stanley & Co. International PLC

01/03/19

0.65

EUR

1,380

(2,718

)

5-Year Interest Rate Swap, 02/15/24

2.50

Semi-annual

3-Month LIBOR,
2.32

Quarterly

Barclays Bank PLC

02/13/19

2.50

USD

12,850

(56,613

)

10-Year Interest Rate Swap, 03/15/29

2.00

Semi-annual

3-Month LIBOR,
2.32

Quarterly

Barclays Bank PLC

03/13/19

2.00

USD

4,580

(8,422

)

2-Year Interest Rate Swap, 03/23/21

2.20

Semi-annual

3-Month LIBOR,
2.32

Quarterly

JPMorgan Chase Bank N.A.

03/21/19

2.20

USD

15,400

(12,060

)

2-Year Interest Rate Swap, 03/30/21

1.75

Semi-annual

3-Month LIBOR,
2.32

Quarterly

JPMorgan Chase Bank N.A.

03/28/19

1.75

USD

8,470

(2,020

)

2-Year Interest Rate Swap, 04/14/21

2.20

Semi-annual

3-Month LIBOR,
2.32

Quarterly

JPMorgan Chase Bank N.A.

04/12/19

2.20

USD

6,700

(5,783

)


		37

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

OTC Interest Rate Swaptions Written (continued)

Description

Paid by the Trust

Received by the Trust

Counterparty

Expiration
Date

Exercise
Rate

Notional
Amount (000)

Value

Rate

Frequency

Rate

Frequency

Call

2-Year Interest Rate Swap, 06/01/21

2.45

Semi-annual

3-Month LIBOR,
2.32

Quarterly

JPMorgan Chase Bank N.A.

05/30/19

2.45

USD

28,520

(54,306

)

2-Year Interest Rate Swap, 11/06/21

1.70

Semi-annual

3-Month LIBOR,
2.32

Quarterly

Barclays Bank PLC

11/04/19

1.70

USD

11,900

(7,945

)

2-Year Interest Rate Swap, 02/09/22

2.20

Semi-annual

3-Month LIBOR,
2.32

Quarterly

Deutsche Bank AG

02/07/20

2.20

USD

10,790

(24,205

)

2-Year Interest Rate Swap, 02/16/22

2.35

Semi-annual

3-Month LIBOR,
2.32

Quarterly

Deutsche Bank AG

02/14/20

2.35

USD

10,690

(31,458

)

2-Year Interest Rate Swap, 02/23/22

2.35

Semi-annual

3-Month LIBOR,
2.32

Semi-annual

UBS AG

02/21/20

2.35

USD

10,600

(31,495

)

2-Year Interest Rate Swap, 04/16/22

2.88

Semi-annual

3-Month LIBOR,
2.32

Quarterly

Deutsche Bank AG

04/14/20

2.88

USD

16,840

(126,343

)

2-Year Interest Rate Swap, 04/16/22

2.89

Semi-annual

3-Month LIBOR,
2.32

Quarterly

Credit Suisse International

04/14/20

2.89

USD

16,870

(128,218

)

2-Year Interest Rate Swap, 04/19/22

2.94

Semi-annual

3-Month LIBOR,
2.32

Quarterly

Bank of America N.A.

04/17/20

2.94

USD

16,540

(127,878

)

2-Year Interest Rate Swap, 05/31/22

2.90

Semi-annual

3-Month LIBOR,
2.32

Quarterly

Deutsche Bank AG

05/29/20

2.90

USD

9,270

(72,332

)

5-Year Interest Rate Swap, 01/07/27

1.70

Semi-annual

3-Month LIBOR,
2.32

Quarterly

Goldman Sachs Bank USA

01/05/22

1.70

USD

5,000

(33,479

)

5-Year Interest Rate Swap, 02/10/27

1.75

Semi-annual

3-Month LIBOR,
2.32

Semi-annual

Deutsche Bank AG

02/08/22

1.75

USD

5,000

(36,390

)

(762,328

)

Put

2-Year Interest Rate Swap, 06/29/20

3-Month LIBOR

Quarterly

3-Month LIBOR,
2.32

Semi-annual

Goldman Sachs Bank USA

06/27/18

1.45

USD

10,000

(241,764

)

10-Year Interest Rate Swap, 07/15/28

3-Month LIBOR

Quarterly

3-Month LIBOR,
2.32

Semi-annual

Deutsche Bank AG

07/13/18

2.45

USD

2,000

(75,750

)

10-Year Interest Rate Swap, 09/08/28

3-Month LIBOR

Quarterly

3-Month LIBOR,
2.32

Semi-annual

Barclays Bank PLC

09/06/18

2.45

USD

2,400

(96,947

)

2-Year Interest Rate Swap, 09/08/20

3-Month LIBOR

Quarterly

3-Month LIBOR,
2.32

Semi-annual

Goldman Sachs Bank USA

09/06/18

1.50

USD

26,000

(628,304

)

10-Year Interest Rate Swap, 01/05/29

3-Month LIBOR

Semi-annual

6-Month EURIBOR,

(0.27

)

Annual

Morgan Stanley & Co. International PLC

01/03/19

1.65

EUR

1,380

(2,580

)

2-Year Interest Rate Swap, 01/31/21

6-Month LIBOR

Quarterly

3-Month LIBOR,
2.32

Semi-annual

Deutsche Bank AG

01/29/19

2.95

USD

58,330

(150,547

)

2-Year Interest Rate Swap, 03/23/21

3-Month LIBOR

Quarterly

3-Month LIBOR,
2.32

Semi-annual

Goldman Sachs Bank USA

03/21/19

2.60

USD

15,400

(107,244

)

2-Year Interest Rate Swap, 03/23/21

6-Month LIBOR

Quarterly

3-Month LIBOR,
2.32

Semi-annual

JPMorgan Chase Bank N.A.

03/21/19

3.15

USD

10,090

(18,830

)

2-Year Interest Rate Swap, 03/30/21

3-Month LIBOR

Quarterly

3-Month LIBOR,
2.32

Semi-annual

JPMorgan Chase Bank N.A.

03/28/19

2.75

USD

8,470

(44,128

)

2-Year Interest Rate Swap, 04/10/21

3-Month LIBOR

Quarterly

3-Month LIBOR,
2.32

Semi-annual

JPMorgan Chase Bank N.A.

04/08/19

2.35

USD

7,530

(81,477

)

2-Year Interest Rate Swap, 04/14/21

3-Month LIBOR

Quarterly

3-Month LIBOR,
2.32

Semi-annual

JPMorgan Chase Bank N.A.

04/12/19

2.60

USD

13,400

(96,566

)

2-Year Interest Rate Swap, 05/04/21

3-Month LIBOR

Quarterly

3-Month LIBOR,
2.32

Semi-annual

Barclays Bank PLC

05/02/19

3.20

USD

11,200

(22,044

)

10-Year Interest Rate Swap, 05/10/29

3-Month LIBOR

Quarterly

3-Month LIBOR,
2.32

Semi-annual

JPMorgan Chase Bank N.A.

05/08/19

3.15

USD

15,500

(225,873

)


38

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

OTC Interest Rate Swaptions Written (continued)


Description	Paid by the Trust				Received by the Trust				Counterparty	Expiration Date		Exercise Rate			Notional Amount (000)			Value
Description	Rate			Frequency	Rate			Frequency	Counterparty	Expiration Date		Exercise Rate			Notional Amount (000)			Value
Put
2-Year Interest Rate Swap, 06/01/21		3-Month LIBOR, 2.32	%	Quarterly		3.25	%	Semi-annual	JPMorgan Chase Bank N.A.		05/30/19		3.25	%		USD	28,520	$	(55,288	)
2-Year Interest Rate Swap, 11/06/21		3-Month LIBOR, 2.32		Quarterly		2.70		Semi-annual	Barclays Bank PLC		11/04/19		2.70			USD	11,900		(92,685	)
2-Year Interest Rate Swap,		3-Month LIBOR, 2.32		Quarterly		2.70		Semi-annual	JPMorgan Chase Bank N.A.		11/06/19		2.70			USD	20,000		(155,679	)
2-Year Interest Rate Swap, 01/23/22		3-Month LIBOR, 2.32		Quarterly		2.85		Semi-annual	JPMorgan Chase Bank N.A.		01/21/20		2.85			USD	18,900		(127,163	)
2-Year Interest Rate Swap, 02/05/22		3-Month LIBOR, 2.32		Quarterly		3.15		Semi-annual	Barclays Bank PLC		02/03/20		3.15			USD	35,510		(154,018	)
2-Year Interest Rate Swap, 02/09/22		3-Month LIBOR, 2.32		Quarterly		3.20		Semi-annual	Deutsche Bank AG		02/07/20		3.20			USD	10,790		(43,347	)
2-Year Interest Rate Swap, 02/16/22		3-Month LIBOR, 2.32		Quarterly		3.35		Semi-annual	Deutsche Bank AG		02/14/20		3.35			USD	10,690		(34,134	)
2-Year Interest Rate Swap, 02/23/22		3-Month LIBOR, 2.32		Quarterly		3.35		Semi-annual	UBS AG		02/21/20		3.35			USD	10,600		(34,174	)
2-Year Interest Rate Swap, 04/16/22		3-Month LIBOR, 2.32		Quarterly		2.88		Semi-annual	Deutsche Bank AG		04/14/20		2.88			USD	16,840		(111,094	)
2-Year Interest Rate Swap, 04/16/22		3-Month LIBOR, 2.32		Quarterly		2.89		Semi-annual	Credit Suisse International		04/14/20		2.89			USD	16,870		(109,796	)
2-Year Interest Rate Swap, 04/19/22		3-Month LIBOR, 2.32		Quarterly		2.94		Semi-annual	Bank of America N.A.		04/17/20		2.94			USD	16,540		(105,444	)
2-Year Interest Rate Swap, 05/07/22		3-Month LIBOR, 2.32		Quarterly		3.15		Semi-annual	Goldman Sachs Bank USA		05/05/20		3.15			USD	8,800		(43,109	)
15-Year Interest Rate Swap, 05/17/35		6-Month JPY LIBOR, 0.02		Semi-annual		2.10		Semi-annual	Barclays Bank PLC		05/15/20		2.10			JPY	250,000		(2,665	)
2-Year Interest Rate Swap, 05/20/22		3-Month LIBOR, 2.32		Quarterly		3.50		Semi-annual	JPMorgan Chase Bank N.A.		05/18/20		3.50			USD	10,000		(29,750	)
2-Year Interest Rate Swap, 05/24/22		3-Month LIBOR, 2.32		Quarterly		3.55		Semi-annual	Deutsche Bank AG		05/22/20		3.55			USD	16,000		(44,441	)
2-Year Interest Rate Swap, 05/31/22		3-Month LIBOR, 2.32		Quarterly		2.90		Semi-annual	Deutsche Bank AG		05/29/20		2.90			USD	9,270		(66,797	)
2-Year Interest Rate Swap, 05/31/22		3-Month LIBOR, 2.32		Quarterly		3.35		Semi-annual	Goldman Sachs Bank USA		05/29/20		3.35			USD	13,040		(50,682	)
10-Year Interest Rate Swap, 02/03/21		3-Month LIBOR, 2.32		Quarterly		5.50		Semi-annual	Bank of America N.A.		02/01/21		5.50			USD	10,000		(21,477	)
10-Year Interest Rate Swap, 02/03/21		3-Month LIBOR, 2.32		Quarterly		5.50		Semi-annual	Citibank N.A.		02/01/21		5.50			USD	10,950		(23,517	)
10-Year Interest Rate Swap, 04/21/31		6-Month EURIBOR, (0.27	)	Semi-annual		2.15		Annual	JPMorgan Chase Bank N.A.		04/19/21		2.15			EUR	4,400		(76,826	)
10-Year Interest Rate Swap, 05/06/31		6-Month EURIBOR, (0.27	)	Semi-annual		2.00		Annual	Barclays Bank PLC		05/04/21		2.00			EUR	2,700		(59,160	)
5-Year Interest Rate Swap, 05/05/27		3-Month LIBOR, 2.32		Quarterly		3.25		Semi-annual	Goldman Sachs Bank USA		05/03/22		3.25			USD	10,130		(191,660	)

																			(3,424,960	)

																		$	(4,187,288	)


		39

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

Centrally Cleared Credit Default Swaps — Sell Protection


Reference Obligation/Index	Financing Rate Received by the Trust		Payment Frequency	Termination Date	Credit Rating ^(a)	Notional Amount (000) ^(b)			Value		Upfront Premium Paid (Received)			Unrealized Appreciation (Depreciation)
Chesapeake Energy Corp.	5.00	%	Quarterly	12/20/21	CCC	USD	270	$	11,062	$	(8,053	)	$	19,115
Markit iTraxx XO, Series 29, Version 1	5.00		Quarterly	06/20/23	NR	EUR	170		19,092		20,991			(1,899	)

								$	30,154	$	12,938		$	17,216

^(a)

Using Standard & Poor’s (“S&P’s”) rating of the issuer or the underlying securities of the index, as applicable.

^(b)

The maximum potential amount the Trust may pay should a negative credit event take place as defined under the terms of the agreement.

Centrally Cleared Interest Rate Swaps


Paid by the Trust		Received by the Trust		Effective Date			Termination Date		Notional Amount (000)		Value			Upfront Premium Paid (Received)		Unrealized Appreciation (Depreciation)
Rate	Frequency	Rate	Frequency	Effective Date			Termination Date		Notional Amount (000)		Value			Upfront Premium Paid (Received)		Unrealized Appreciation (Depreciation)
3-Month LIBOR, 2.32%	Quarterly	1.59%	Semi-annual		06/13/18	^(a)		08/01/18	USD	357,000	$	(147,090	)	$	3,632	$	(150,722	)
1.61	Semi-annual	3-Month LIBOR, 2.32	Quarterly		08/01/18	^(a)		09/26/18	USD	312,000		148,873			3,174		145,699
3-Month LIBOR, 2.32	Quarterly	2.41	Semi-annual		N/A			03/21/19	USD	39,000		(1,680	)		336		(2,016	)
3-Month LIBOR, 2.32	Quarterly	2.59	Semi-annual		09/17/18	^(a)		09/17/19	USD	17,880		(6,419	)		191		(6,610	)
2.82	Semi-annual	3-Month LIBOR, 2.32	Quarterly		03/21/19	^(a)		03/21/20	USD	39,000		(11,532	)		418		(11,950	)
2.65	Semi-annual	3-Month LIBOR, 2.32	Quarterly		07/05/18	^(a)		07/05/20	USD	28,670		21,136			330		20,806
1.94	Semi-annual	3-Month LIBOR, 2.32	Quarterly		07/09/18	^(a)		07/07/20	USD	6,000		87,207			—		87,207
2.87	Semi-annual	3-Month LIBOR, 2.32	Quarterly		09/16/19	^(a)		09/16/20	USD	18,320		(1,517	)		196		(1,713	)
2.72	Semi-annual	3-Month LIBOR, 2.32	Quarterly		10/11/18	^(a)		10/11/20	USD	2,500		1,961			29		1,932
2.20	Semi-annual	3-Month LIBOR, 2.32	Quarterly		12/03/18	^(a)		12/03/20	USD	22,400		253,443			263		253,180
3-Month LIBOR, 2.32	Quarterly	2.32	Semi-annual		12/17/19	^(a)		12/17/20	USD	39,000		(203,383	)		417		(203,800	)
2.31	Semi-annual	3-Month LIBOR, 2.32	Quarterly		12/21/18	^(a)		12/21/20	USD	5,460		51,460			64		51,396
2.66	Semi-annual	3-Month LIBOR, 2.32	Quarterly		01/31/19	^(a)		01/31/21	USD	17,170		51,452			202		51,250
2.81	Semi-annual	3-Month LIBOR, 2.32	Quarterly		02/20/19	^(a)		02/20/21	USD	8,260		2,374			97		2,277
2.88	Semi-annual	3-Month LIBOR, 2.32	Quarterly		03/18/19	^(a)		03/18/21	USD	30,110		(26,774	)		355		(27,129	)
3-Month LIBOR, 2.32	Quarterly	2.76	Semi-annual		04/01/19	^(a)		04/01/21	USD	4,530		(6,786	)		53		(6,839	)
3-Month LIBOR, 2.32	Quarterly	2.76	Semi-annual		04/01/19	^(a)		04/01/21	USD	4,530		(6,742	)		53		(6,795	)
3-Month LIBOR, 2.32	Quarterly	2.86	Semi-annual		04/06/20	^(a)		04/06/21	USD	8,460		(2,197	)		90		(2,287	)
3.02	Semi-annual	3-Month LIBOR, 2.32	Quarterly		04/25/19	^(a)		04/25/21	USD	2,990		(9,561	)		34		(9,595	)


40

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

Centrally Cleared Interest Rate Swaps (continued)


Paid by the Trust		Received by the Trust		Effective Date			Termination Date		Notional Amount (000)		Value			Upfront Premium Paid (Received)		Unrealized Appreciation (Depreciation)
Rate	Frequency	Rate	Frequency	Effective Date			Termination Date		Notional Amount (000)		Value			Upfront Premium Paid (Received)		Unrealized Appreciation (Depreciation)
3-Month LIBOR, 2.32%	Quarterly	2.95%	Semi-annual		05/30/19	^(a)		05/30/21	USD	4,570	$	7,749		$	53	$	7,696
3-Month LIBOR, 2.32	Quarterly	2.88	Semi-annual		05/31/19	^(a)		05/31/21	USD	3,820		1,132			44		1,088
3-Month LIBOR, 2.32	Quarterly	2.89	Semi-annual		05/31/19	^(a)		05/31/21	USD	3,820		1,712			44		1,668
3-Month LIBOR, 2.32	Quarterly	2.90	Semi-annual		05/31/19	^(a)		05/31/21	USD	5,480		3,757			63		3,694
3-Month LIBOR, 2.32	Quarterly	2.80	Semi-annual		05/31/19	^(a)		05/31/21	USD	3,820		(4,817	)		44		(4,861	)
3-Month LIBOR, 2.32	Quarterly	2.82	Semi-annual		05/31/19	^(a)		05/31/21	USD	7,660		(6,314	)		88		(6,402	)
3-Month LIBOR, 2.32	Quarterly	2.81	Semi-annual		05/31/19	^(a)		05/31/21	USD	3,810		(4,226	)		44		(4,270	)
3-Month LIBOR, 2.32	Quarterly	2.76	Semi-annual		05/31/19	^(a)		05/31/21	USD	7,660		(14,606	)		88		(14,694	)
3-Month LIBOR, 2.32	Quarterly	2.76	Semi-annual		05/31/19	^(a)		05/31/21	USD	6,890		(13,662	)		79		(13,741	)
2.82	Semi-annual	3-Month LIBOR, 2.32	Quarterly		06/03/19	^(a)		06/03/21	USD	3,830		3,166			44		3,122
2.91	Semi-annual	3-Month LIBOR, 2.32	Quarterly		06/04/19	^(a)		06/04/21	USD	4,120		(3,687	)		47		(3,734	)
2.20	Semi-annual	3-Month LIBOR, 2.32	Quarterly		11/08/19	^(a)		11/08/21	USD	5,900		75,721			69		75,652
2.36	Semi-annual	3-Month LIBOR, 2.32	Quarterly		12/17/20	^(a)		12/17/21	USD	39,000		192,943			417		192,526
2.62	Semi-annual	3-Month LIBOR, 2.32	Quarterly		01/22/20	^(a)		01/22/22	USD	7,200		36,036			85		35,951
2.85	Semi-annual	3-Month LIBOR, 2.32	Quarterly		02/07/20	^(a)		02/07/22	USD	13,020		9,447			153		9,294
2.96	Semi-annual	3-Month LIBOR, 2.32	Quarterly		02/24/20	^(a)		02/24/22	USD	3,930		(5,290	)		46		(5,336	)
2.98	Semi-annual	3-Month LIBOR, 2.32	Quarterly		03/24/20	^(a)		03/24/22	USD	9,300		(16,244	)		109		(16,353	)
2.86	Semi-annual	3-Month LIBOR, 2.32	Quarterly		04/06/21	^(a)		04/06/22	USD	8,460		1,989			90		1,899
2.85	Semi-annual	3-Month LIBOR, 2.32	Quarterly		04/07/20	^(a)		04/07/22	USD	3,750		2,533			43		2,490
3.08	Semi-annual	3-Month LIBOR, 2.32	Quarterly		05/12/20	^(a)		05/12/22	USD	3,670		(13,202	)		42		(13,244	)
3.20	Semi-annual	3-Month LIBOR, 2.32	Quarterly		05/19/20	^(a)		05/19/22	USD	1,650		(9,666	)		19		(9,685	)
2.87	Semi-annual	3-Month LIBOR, 2.32	Quarterly		06/02/20	^(a)		06/02/22	USD	4,000		1,262			46		1,216
3-Month LIBOR, 2.32	Quarterly	2.66	Semi-annual		N/A			02/15/23	USD	5,490		2,885			68		2,817
3-Month LIBOR, 2.32	Quarterly	2.78	Semi-annual		N/A			03/02/23	USD	3,140		4,558			40		4,518
3-Month LIBOR, 2.32	Quarterly	2.80	Semi-annual		N/A			03/15/23	USD	3,920		6,587			50		6,537


		41

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

Centrally Cleared Interest Rate Swaps (continued)


Paid by the Trust		Received by the Trust		Effective Date			Termination Date		Notional Amount (000)		Value			Upfront Premium Paid (Received)		Unrealized Appreciation (Depreciation)
Rate	Frequency	Rate	Frequency	Effective Date			Termination Date		Notional Amount (000)		Value			Upfront Premium Paid (Received)		Unrealized Appreciation (Depreciation)
3-Month LIBOR, 2.32%	Quarterly	2.71%	Semi-annual		N/A			04/03/23	USD	9,210	$	(30,862	)	$	118	$	(30,980	)
3-Month LIBOR, 2.32	Quarterly	2.74	Semi-annual		N/A			04/03/23	USD	4,700		(9,001	)		60		(9,061	)
3.00	Semi-annual	3-Month LIBOR, 2.32	Quarterly		N/A			05/22/23	USD	2,870		(27,675	)		36		(27,711	)
3-Month LIBOR, 2.32	Quarterly	2.65	Semi-annual		01/25/19	^(a)		01/25/24	USD	3,290		(31,293	)		43		(31,336	)
3-Month LIBOR, 2.32	Quarterly	2.75	Semi-annual		01/31/19	^(a)		01/31/24	USD	7,480		(36,609	)		99		(36,708	)
3-Month LIBOR, 2.32	Quarterly	2.86	Semi-annual		02/15/19	^(a)		02/15/24	USD	3,300		(10	)		42		(52	)
3-Month LIBOR, 2.32	Quarterly	3.08	Semi-annual		05/13/19	^(a)		05/13/24	USD	740		7,136			9		7,127
3-Month LIBOR, 2.32	Quarterly	3.19	Semi-annual		05/21/19	^(a)		05/21/24	USD	790		11,306			10		11,296
2.83	Semi-annual	3-Month LIBOR, 2.32	Quarterly		05/31/19	^(a)		05/31/24	USD	3,180		7,393			40		7,353
3-Month LIBOR, 2.32	Quarterly	2.90	Semi-annual		06/03/19	^(a)		06/03/24	USD	1,270		1,151			16		1,135
3.05	Semi-annual	3-Month LIBOR, 2.32	Quarterly		09/28/18	^(a)		04/30/25	USD	2,550		(30,348	)		35		(30,383	)
3-Month LIBOR, 2.32	Quarterly	2.75	Semi-annual		01/05/22	^(a)		01/05/27	USD	1,430		(10,360	)		18		(10,378	)
3-Month LIBOR, 2.32	Quarterly	2.32	Semi-annual		N/A			05/03/27	USD	1,020		(43,873	)		—		(43,873	)
2.34	Semi-annual	3-Month LIBOR, 2.32	Quarterly		N/A			10/12/27	USD	4,100		179,515			60		179,455
6-Month JPY LIBOR, 0.02	Semi-annual	0.37	Semi-annual		N/A			01/29/28	JPY	181,730		14,446			28		14,418
2.88	Semi-annual	3-Month LIBOR, 2.32	Quarterly		N/A			02/15/28	USD	2,860		(23,111	)		44		(23,155	)
3.17	Semi-annual	3-Month LIBOR, 2.32	Quarterly		09/28/18	^(a)		02/15/28	USD	9,940		(228,160	)		147		(228,307	)
2.93	Semi-annual	3-Month LIBOR, 2.32	Quarterly		N/A			03/02/28	USD	1,630		(11,993	)		25		(12,018	)
2.93	Semi-annual	3-Month LIBOR, 2.32	Quarterly		N/A			03/15/28	USD	2,040		(14,222	)		31		(14,253	)
2.91	Semi-annual	3-Month LIBOR, 2.32	Quarterly		N/A			03/27/28	USD	1,620		(7,456	)		25		(7,481	)
2.81	Semi-annual	3-Month LIBOR, 2.32	Quarterly		N/A			04/03/28	USD	4,770		23,138			74		23,064
2.84	Semi-annual	3-Month LIBOR, 2.32	Quarterly		N/A			04/03/28	USD	2,440		4,658			38		4,620
2.90	Semi-annual	3-Month LIBOR, 2.32	Quarterly		N/A			04/19/28	USD	800		(2,761	)		12		(2,773	)
3-Month LIBOR, 2.32	Quarterly	3.14	Semi-annual		N/A			05/22/28	USD	3,300		78,265			49		78,216
6-Month EURIBOR	Semi-annual	0.86	Annual		N/A			05/31/28	EUR	420		(2,030	)		7		(2,037	)


42

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

Centrally Cleared Interest Rate Swaps (continued)


Paid by the Trust		Received by the Trust		Effective Date			Termination Date		Notional Amount (000)		Value			Upfront Premium Paid (Received)		Unrealized Appreciation (Depreciation)
Rate	Frequency	Rate	Frequency	Effective Date			Termination Date		Notional Amount (000)		Value			Upfront Premium Paid (Received)		Unrealized Appreciation (Depreciation)
1.37%	Annual	6-Month EURIBOR, (0.27)%	Semi-annual		02/20/19	^(a)		02/20/29	EUR	1,970	$	(69,336	)	$	44	$	(69,380	)
1.38	Annual	6-Month EURIBOR, (0.27)	Semi-annual		02/22/19	^(a)		02/22/29	EUR	990		(35,837	)		22		(35,859	)
2.90	Semi-annual	3-Month LIBOR, 2.32	Quarterly		01/27/27	^(a)		01/27/37	USD	730		5,847			10		5,837
3.07	Semi-annual	3-Month LIBOR, 2.32	Quarterly		03/22/27	^(a)		03/20/37	USD	1,000		(4,306	)		14		(4,320	)
2.68	Semi-annual	3-Month LIBOR, 2.32	Quarterly		06/28/27	^(a)		06/28/37	USD	1,130		26,116			—		26,116
2.80	Semi-annual	3-Month LIBOR, 2.32	Quarterly		09/29/27	^(a)		09/29/37	USD	760		10,863			12		10,851
3-Month LIBOR, 2.32	Quarterly	3.18	Semi-annual		05/09/28	^(a)		05/09/38	USD	1,590		18,461			24		18,437
3.20	Semi-annual	3-Month LIBOR, 2.32	Quarterly		09/28/18	^(a)		11/15/43	USD	4,340		(219,796	)		82		(219,878	)
3-Month LIBOR, 2.32	Quarterly	3.06	Semi-annual		02/15/23	^(a)		02/15/53	USD	3,210		97,839			72		97,767

											$	101,083		$	13,195	$	87,888

^(a)

Forward swap.

OTC Credit Default Swaps — Buy Protection


Reference Obligation/Index	Financing Rate Paid by the Trust			Payment Frequency		Counterparty	Termination Date		Notional Amount (000)		Value		Upfront Premium Paid (Received)		Unrealized Appreciation (Depreciation)
Frontier Communications Corp.		5.00	%		Quarterly	Barclays Bank PLC		06/20/23	USD	123	$	34,721	$	41,831	$	(7,110	)

											$	34,721	$	41,831	$	(7,110	)

OTC Credit Default Swaps — Sell Protection


Reference Obligation/Index	Financing Rate Received by the Trust		Payment Frequency	Counterparty	Termination Date	Credit Rating^(a)		Notional Amount (000)	^(b)		Value			Upfront Premium Paid (Received)			Unrealized Appreciation (Depreciation)
Jaguar Land Rover Automotive PLC	5.00	%	Quarterly	Credit Suisse International	06/20/22	BB+	EUR	20		$	2,950		$	3,209		$	(259	)
Jaguar Land Rover Automotive PLC	5.00		Quarterly	Barclays Bank PLC	12/20/22	BB+	EUR	20			2,944			3,694			(750	)
Telecom Italia SpA/Milano	1.00		Quarterly	Citibank N.A.	12/20/22	N/R	EUR	20			(750	)		(379	)		(371	)
Casino Guichard Perrachon SA	1.00		Quarterly	BNP Paribas S.A.	06/20/23	BB+	EUR	10			(1,235	)		(1,027	)		(208	)
Casino Guichard Perrachon SA	1.00		Quarterly	JPMorgan Chase Bank N.A.	06/20/23	BB+	EUR	10			(1,235	)		(1,017	)		(218	)
Intesa Sanpaolo SpA	1.00		Quarterly	Citibank N.A.	06/20/23	BBB	EUR	20			(3,136	)		(3,144	)		8
Intrum AB	5.00		Quarterly	Credit Suisse International	06/20/23	BB+	EUR	10			982			1,021			(39	)
Intrum AB	5.00		Quarterly	Credit Suisse International	06/20/23	BB+	EUR	5			449			552			(103	)


		43

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

OTC Credit Default Swaps — Sell Protection (continued)


Reference Obligation/Index	Financing Rate Received by the Trust		Payment Frequency	Counterparty	Termination Date	Credit Rating^(a)		Notional Amount (000)	^(b)		Value			Upfront Premium Paid (Received)			Unrealized Appreciation (Depreciation)
Intrum AB	5.00	%	Quarterly	Morgan Stanley & Co. International PLC	06/20/23	BB+	EUR	15		$	1,515		$	1,860		$	(345	)
Jaguar Land Rover Automotive PLC	5.00		Quarterly	BNP Paribas S.A.	06/20/23	BB+	EUR	5			728			842			(114	)
Markit CMBX North America, Series 8	3.00		Monthly	Barclays Bank PLC	10/17/57	N/R	USD	5,000			(619,516	)		(515,925	)		(103,591	)
Markit CMBX North America, Series 8	3.00		Monthly	Credit Suisse International	10/17/57	N/R	USD	2,500			(309,758	)		(254,934	)		(54,824	)
Markit CMBX North America, Series 8	3.00		Monthly	Morgan Stanley & Co. International PLC	10/17/57	N/R	USD	5,550			(690,437	)		(753,551	)		63,114
Markit CMBX North America, Series 9	3.00		Monthly	Morgan Stanley & Co. International PLC	09/17/58	N/R	USD	9,450			(944,483	)		(1,186,068	)		241,585
Markit CMBX North America, Series 9	3.00		Monthly	Credit Suisse International	09/17/58	N/R	USD	5,000			(499,726	)		(551,316	)		51,590
Markit CMBX North America, Series 9	3.00		Monthly	Credit Suisse International	09/17/58	N/R	USD	5,000			(499,726	)		(551,316	)		51,590
Markit CMBX North America, Series 9	3.00		Monthly	Credit Suisse International	09/17/58	N/R	USD	5,000			(499,726	)		(545,294	)		45,568
Markit CMBX North America, Series 9	3.00		Monthly	Credit Suisse International	09/17/58	N/R	USD	5,000			(499,726	)		(551,263	)		51,537

										$	(4,559,886	)	$	(4,904,056	)	$	344,170

^(a)

Using Standard & Poor’s (“S&P’s”) rating of the issuer or the underlying securities of the index, as applicable.

^(b)

The maximum potential amount the Trust may pay should a negative credit event take place as defined under the terms of the agreement.


44

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)

Fair Value Hierarchy as of Period End

Various inputs are used in determining the fair value of investments and derivative financial instruments. These inputs to valuation techniques are categorized into a fair value hierarchy consisting of three broad levels for financial reporting purposes as follows:

•

Level 1 — Unadjusted quoted prices in active markets/exchanges for identical assets or liabilities that Trust has the ability to access

•

Level 2 — Other observable inputs (including, but not limited to, quoted prices for similar assets or liabilities in markets that are active, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the assets or liabilities (such as interest rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates) or other market-corroborated inputs)

•

Level 3 — Unobservable inputs based on the best information available in the circumstances, to the extent observable inputs are not available (including the Trust’s own assumptions used in determining the fair value of investments and deri/vative financial instruments)

The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). Accordingly, the degree of judgment exercised in determining fair value is greatest for instruments categorized in Level 3. The inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes, the fair value hierarchy classification is determined based on the lowest level input that is significant to the fair value measurement in its entirety. Investments classified within Level 3 have significant unobservable inputs used by the BlackRock Global Valuation Methodologies Committee (the “Global Valuation Committee”) in determining the price for Fair Valued Investments. Level 3 investments include equity or debt issued by privately held companies or funds. There may not be a secondary market, and/or there are a limited number of investors. Level 3 investments may also be adjusted to reflect illiquidity and/or non-transferability, with the amount of such discount estimated by the Global Valuation Committee in the absence of market information.

Changes in valuation techniques may result in transfers into or out of an assigned level within the hierarchy. In accordance with the Trust’s policy, transfers between different levels of the fair value hierarchy are deemed to have occurred as of the beginning of the reporting period. The categorization of a value determined for investments and derivative financial instruments is based on the pricing transparency of the investments and derivative financial instruments and is not necessarily an indication of the risks associated with investing in those securities. For information about the Trust’s policy regarding valuation of investments and derivative financial instruments, refer to the Trust’s most recent financial statements as contained in its semi-annual report.

446666

As of May 31, 2018, the following tables summarize the Trust’s investments and derivative financial instruments categorized in the disclosure hierarchy:


	Level 1		Level 2		Level 3		Total
Assets:
Investments:
Long-Term Investments:
Asset-Backed Securities	$	—	$	85,616,936	$	2,079,315	$	87,696,251
Corporate Bonds		640,545		507,446,099		6,504,876		514,591,520
Floating Rate Loan Interests		—		15,226,769		1,643,554		16,870,323
Foreign Agency Obligations		—		31,296,182		—		31,296,182
Municipal Bonds		—		24,184,778		—		24,184,778
Non-Agency Mortgage-Backed Securities		—		69,035,873		—		69,035,873
Preferred Securities		7,038,903		85,312,020		—		92,350,923
Trust Preferred		794,599		—		—		794,599
U.S. Government Sponsored Agency Securities		—		110,648,197		2		110,648,199
Unfunded Floating Rate Loan Interests^(a)		—		23		—		23
U.S. Treasury Obligations		—		124,006,164		—		124,006,164
Short-Term Securities		20,931,481		—		—		20,931,481
Options Purchased
Interest Rate Contracts		22,338		17,391		—		39,729

	$	29,427,866	$	1,052,790,432	$	10,227,747	$	1,092,446,045


		45

Schedule of Investments (unaudited) (continued)

May 31, 2018

BlackRock Core Bond Trust (BHK)


	Level 1			Level 2			Level 3		Total
Derivative Financial Instruments^(b)
Assets:
Credit contracts	$	—		$	524,107		$	—	$	524,107
Forward foreign currency contracts		—			920,473			—		920,473
Interest rate contracts		187,989			1,449,607			—		1,637,596
Liabilities:
Credit contracts		—			(169,831	)		—		(169,831	)
Forward foreign currency contracts		—			(25,647	)		—		(25,647	)
Equity contracts		(791	)							(791	)
Interest rate contracts		(624,526	)		(5,549,007	)		—		(6,173,533	)

	$	(437,328	)	$	(2,850,298	)	$	—	$	(3,287,626	)

^(a)

Unfunded floating rate loan interests are valued at the unrealized appreciation (depreciation) on the commitment.

^(b)

Derivative financial instruments are swaps, futures contracts, forward foreign currency exchange contracts and options written. Swaps, futures contracts and forward foreign currency exchange contracts are valued at the unrealized appreciation (depreciation) on the instrument and options written are shown at value.

The Trust may hold assets and/or liabilities in which the fair value approximates the carrying amount or face value, including accrued interest, for financial reporting purposes. As of period end, reverse repurchase agreements of $343,682,887 are categorized as level 2 within the disclosure hierarchy.

During the period ended May 31, 2018, there were no transfers between Level 1 and Level 2.

A reconciliation of Level 3 investments is presented when the Trust had a significant amount of Level 3 investments at the beginning and/or end of the period in relation to net assets. The following table is a reconciliation of Level 3 investments for which significant unobservable inputs were used in determining fair value:


	Asset- Backed Securities			Corporate Bonds			Floating Rate Loan Interests			U.S. Government Sponsored Agency Securities		Total
Assets:
Opening Balance, as of August 31, 2017	$	2,069,938		$	7,166,469		$	707,182		$	2	$	9,943,591
Transfers into Level 3		—			—			426,347			—		426,347
Transfers out of Level 3		(1,750,000	)		—			(364,965	)		—		(2,114,965	)
Accrued discounts (premiums)		(81,804	)		—			1,887			—		(79,917	)
Net realized gain (loss)		—			—			15,553			—		15,553
Net change in unrealized appreciation (depreciation)^(a)		46,181			(209,238	)		25,810			—		(137,247	)
Purchases		1,795,000			—			1,252,987			—		3,047,987
Sales		—			(452,355	)		(421,247	)		—		(873,602	)

Closing Balance, as of May 31, 2018	$	2,079,315		$	6,504,876		$	1,643,554		$	2	$	10,227,747

Net change in unrealized appreciation (depreciation) on investments still held at May 31, 2018^(a)	$	46,181		$	(209,238	)	$	26,422		$	—	$	(136,636	)

^(a)

Any difference between net change in unrealized appreciation (depreciation) and net change in unrealized appreciation (depreciation) on investments still held at May 31, 2018 is generally due to derivative financial investments no longer held or categorized as Level 3 at period end.

The Trust’s investments that are categorized as Level 3 were valued utilizing third party pricing information without adjustment. Such valuations are based on unobservable inputs. A significant change in third party information could result in a significantly lower or higher value of such Level 3 investments.


46

Item 2 – Controls and Procedures

2(a) –

The registrant’s principal executive and principal financial officers, or persons performing similar functions, have concluded that the registrant’s disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the “1940 Act”)) are effective as of a date within 90 days of the filing of this report based on the evaluation of these controls and procedures required by Rule 30a-3(b) under the 1940 Act and Rule 13a-15(b) under the Securities Exchange Act of 1934, as amended.

2(b) –

There were no changes in the registrant’s internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act) that occurred during the registrant’s last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the registrant’s internal control over financial reporting.

Item 3 – Exhibits

Certifications – Attached hereto

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.


		BlackRock Core Bond Trust

		By:		/s/ John M. Perlowski
				John M. Perlowski
				Chief Executive Officer (principal executive officer) of
				BlackRock Core Bond Trust

Date: July 19, 2018

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

Date: July 19, 2018

Date: July 19, 2018